Question

the diameter of a semicircle is 140 mm. find the circumference in cm

Answer 1

140mm = 14 cm

circumference of semicircle )=πr

=22/7 × 14/2

=22cm

Answer 2

Hey mate ___

Here is your answer-
_____

let,
the diameter of a semicircle = 140mm

We now,
1cm = 10mm

Therefore, 140mm = 14cm

radius of semicircle = 7cm

Perimeter of semicircle = πr

= 22/7 × 7

= 22cm

Therefore, the perimeter of semicircle is 22cm.

Hope helpful __