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question 1.

question 2.

question 3

 Feb 2, 2020
 #1
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Question 1

 

Jenny, the circumference of a circle is 2pi*r

r stands for radius but it can also stand for radians.

 

So in a complete circle there are 2pi radians and 360 degrees.

So long as you know that you can work all the others out for yourself.

 Feb 2, 2020

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