Question

the perimeter of a semi circle is 28.8 cm then its area is

Answer 1

131.7 cm^2 is it's area...

Answer 2

perimeter = 28.8
substitute R = P/[pi+2]
                    =28.8/3.14+2
                    =5.6cm
Therefore area = pi R^2/2
                         =3.14(5.6)^2/2
                         =49.2352sq cm