Question

the radius of a circle is 2 feet. What is the length of a 90 degree arc?

Answer 1

Since 90/360 is 1/4, the length of the arc is 1/4 the circle's circumference.

The circumference is (2+2)pi, or 4pi.

1/4 of that is pi.

So, the answer is pi.

Hope this helps!