Question

If the area of the circle is 154 cm square then its perimeter is

Answer 1

• A= \pi r^2 and      perimeter = 2 \pi r

so using the formula for the area first you would nee to find the radius.

so r would be equal to 7

Then use the formula for the perimeter to find the value for the perimeter:

2*\pi *7

The perimeter is equal to 43.98cm..