Question

If the diameter of a protracter is 21cm,then find its perimeter.​

Answer 1

= 32.97cm; ans.

Hope it is helpful to you.

Answer 2

perimeter of a circle = 2πr

radius = diameter/2 = 21/2

= 10.5 cm

2πr

= 2 × 22/7 × 10.5

= 462/7

= 66

half of a circle

66/2 = 33 cm

answer = 33 cm

The diameter of a protracter is 21cm is 33 cm.

hope it helps you ☺..!!