Question

The perimeter of a quarter circle is 14.28 KM. What is the quarter circle's area?

Answer 1

Circumference= 2πr

Circumference= perimeter

14.28km= 2(3.14)r

14.28= 6.2831853072r

divide both sides by 6.2831853072

2.27= r

ANSWER: The radius is 2.27km

Hope this helps!

Answer 2

50.27

Explanation:

perimeter= length of arc + 2r= 14.28

length of arc= rx where x is the angle which is pi/2

radius =4

area= pi* r^2= 50.27