Question

The perimeter of a semicircular plate is 108 cm, find its area.​

Answer 1

Answer:

693

Explanation:

The perimeter = (pi)r + 2r where r is the radius. Here

r[(22/7) + 2] = 108, or

r = 108/[(22/7) + 2] = 21

So the area of the semicircle is (pi)*(21^2)/2 = 693 sq cm.