Question

perimeter of semi circular protractor is 108 cm. Find the diameter of the protractor

Answer 1

πr+2r=108

r{3.14+2}=108

r(5.14)=108

r=21cm

area =1/2πr^2

1/2×22/7×21×21

11×3×21

693cm^2

Answer 2

Perimeter of a protractor 22/7*radius
Radius=7/22*108=34.36
Diameter=68.72cm