Question

Find the perimeter of a semicircular protractor whose diameter is 14 cm

Answer 1

Hey friend

Here is your answer

d=14cm

r=7cm

perimeter of semicircle =πr

P=(22/7)×7

P=22cm

Perimeter of protractor =Perimeter of semicircle +diameter

P=22+14

P=36cm

Answer 2

Hello dear friend
--------------------------

Here is your answer:

Solution
2r = 14 cm
r. =. 7 cm

So formula of the perimeter of a semicircle is
2πr/2 = πr

Hence perimeter= π×7 = 22/7×7=22 cm

Final perimeter : perimeter of semicircle + diameter

=22 + 14 = 36cm