Question

if the perimeter of a semicircular park is 72m, find its area and radius

Answer 1

Perimeter of circle=72 m.
Let the radius of circle be r.
2πr/2 + 2r = 72m
r=72/2 +2
r=14m.

Area of circle =πr^2 /2
308m^2

Answer 2

Perimeter=4xside Side: perimeter/4 Side:72cm/4 Side:18cm Area of square : side side Area:18cmx18cm Area:324seq.cm