The radius of a circle is 3 miles. What is the length of a 180° arc?

Question

Give the exact answer in simplest form 

 

Answer 1

The formula for solving this problem is 2 pi r x C/360, where pi= 3.14 and r is the radius of a circle. C is the degree of the arc. 

Substituting the numbers into the problem, you get:

 

2(3.14)3 x 180/360= 6(3.14) x 0.5= 9.42 miles.