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  أتدرب وأحل المسائل

أتدرب وأحل المسائل

قياس الزاوية بالراديان

أرسم في الوضع القياسي الزاوية التي عُلم قياسها في كلّ ممّا يأتي:

1) 450o

قياس الزاوية بالراديان

2) -900o

قياس الزاوية بالراديان

3) 540o

قياس الزاوية بالراديان

4) -700o

قياس الزاوية بالراديان

5) - begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style  

قياس الزاوية بالراديان

6) begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

قياس الزاوية بالراديان

7) begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

قياس الزاوية بالراديان

8) begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

قياس الزاوية بالراديان

 

أحوّل قياس الزاوية المكتوبة بالدرجات إلى الراديان، وقياس الزاوية المكتوبة بالراديان إلى الدرجات في كلّ ممّا يأتي:

9) -225o

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

10) -135o

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

11) -75o

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

12) 500o

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

13) - begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style 

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

14)  begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

15) 1.2

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

16) 4

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

 

أجد زاويتين إحداهما قياسها موجب، والأخرى قياسها سالب، وكلتاهما مُشتركة في ضلع الانتهاء مع كل زاوية معطاة مما يأتي ثم أرسمهما:

17) 50o

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

18) 135o

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

19) 1290o

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

20) -150o

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

21) begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style  

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

22) - begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

23) - begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

24) begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

 

أجد طول القوس ومساحة القطاع في كل مما يأتي، مقرباً إجابتي إلى أقرب جزء من عشرة:

25)

قياس الزاوية بالراديان

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

26)

قياس الزاوية بالراديان

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

27)

قياس الزاوية بالراديان

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

 

يمثل الشكل المظلل المجاور جزءاً من قطاع دائري:

جزءاً من قطاع دائري

(28) أجد مساحة هذا الشكل.

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

(29) أجد محيط هذا الشكل.

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

 

(30) قطاع دائري مساحته 500 cm2، وطول قوسه 20 cm، أجد قياس زاويته بالراديان.

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

 

(31)مجداف لقياس سرعة التيارات المائية تيار ماء: استعمل العلماء مجداف لقياس سرعة التيارات المائية بناءً على معدّل الدوران. أجد سرعة تيار مائي بالمتر لكل ثانية إذا دارت العجلة 100 دورة في الدقيقة، علماً بأّن طول عجلة المجداف (المسافة من مركز الدائرة إلى طرف المجداف) هو 0.20 m

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

 

 

 

(32) يدوّر طفل حجراً مربوطاً بطرف حبل طوله 3 ft بمعدّل 15 دورة في 10 ثوانٍ. أجد السرعة الزاويّة والسرعة الخطية للحجر.

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

 

شفرة منشار دائرية الشكلقطر شفرة منشار دائرية الشكل 7.5 in، وهي تدور 2400 دورة في الدقيقة:

(33) أجد السرعة الزاويّة لهذه الشفرة بالراديان لكل ثانية.

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

(34) أجد السرعة الخطية لأسنان المنشار عند ملامستها الخشب المراد قطعه.

begin mathsize 20px style table attributes columnalign right left right left right left right left right left right left columnspacing 0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em end attributes row blank cell T tilde N left parenthesis 36 comma 5 squared right parenthesis end cell row blank cell P left parenthesis T greater than 27 right parenthesis equals P left parenthesis z greater than fraction numerator 27 minus 36 over denominator 5 end fraction right parenthesis equals P left parenthesis z greater than negative 1.8 right parenthesis equals P left parenthesis z less than 1.8 right parenthesis equals 0.9641 end cell end table end style

إعداد : شبكة منهاجي التعليمية

25 / 02 / 2023

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