The radius of a circle is 5 kilometers. What is the angle measure of an arc ​𝜋 kilometers long?

Question

I'm not fully sure how to do this problem. I am working on an IXL for my geometry class. This is my last question, and I have gotten similar ones wrong before.

Answer 1

Calculate the full circumference of the circle using C = 2πr. C = 2(pi)r

Then divide your given arc of pi by the full circumference. This will tell you what fraction of the circle the arc takes up. 

 

Then multiply the fraction by 360° to determine the angle.