Question

If the diameter of a semi-circular protractor is 14 cm, then find its perimeter.

Answer 1

Let AB be the diameter of the semi-circular protractor.

We know that perimeter of the semicircle ……(1)

We have given the diameter of the protractor.

Therefore, radius of the protractor

So, radius of the protractor

Substituting the value of r in equation (1) we get,

Substituting we get,

Therefore, perimeter of the semi-circular protractor is.