Question

If the perimeter of a semi circular protractor is 108cm, find the diameter

of the protractor (take π=22

7

).​

Answer 1

Answer:

Perimeter of semi – circular protractor = r(367). Thus we got the radius of the semi – circle as 21cm. Similarly, diameter, d = 2r = 2 × 21 = 42cm. Hence the radius = 21cm and diameter = 42cm.