Question

if the perimeter of semi circular protractor is 36cm find its diameter

Answer 1

Hi

Semi perimeter of prota tractor is 36 cm

So.thw perimeter or circumference of whole = 36+36=72cm

Circumference =22/7*2*r

So,

72=22/7*2*r=44/7*r

R = 72*7/44

=11.45cm

Diameter =2r

=2*11.45

=22.9cm

Hope it helps u

:)