Question

Find the perimeter of a semicirclular protractor whose diameter is 21cm

Answer 1

Given: Diameter Of semicircle =21cm.

To Find; Perimeter of Semicircle = ?

Sol: We have,

                        Perimeter of Semicircle = 1/2 π × d.

                        Perimeter of Semicircle = 1/2 × 22/7 × 21

                        Perimeter of Semicircle = 11 × 3

                        Perimeter of Semicircle = 33 cm.

Answer 2

Step-by-step explanation:

dia=21 so

R=21/2

perimeter of semicircular is=πR

so

(π×21) /2

answer is 32.98cm

protractor word give to confuse us.

and if be say that protractor is semicircular like shape

hope u enjoy the answer