Question

the perimeter of semicircular plate is 108 CM, find its area​

Answer 1

Step-by-step explanation:

circle perimeter =2pi*r

semicircle perimeter = pi*r

perimeter of semi circle plate = pi*r + diameter

= pi*r+2r=108

= r(pi+2) = 108

r= 108/(pi+2) = 21

area of circle =pi*r²

area of semicircle plate = pi*r²/2= 22/7 *21*21/2

=11×3×21

=693 cm²