Question

find the perimeter of the following shapes

Answer 1

A) perimeter =pi*r+s=22/7*7 + 14=36cm

B)perimeter =2*pi*r+2*14=22+28=50cm

C)perimeter =pi*r+2*3=22/7*28/10+6=14.8cm

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Answer 2

a.

Perimeter of the semi circle = 1/2 π × d + d

                                              = 1/2 × 22/7 × 14 + 14 = 36cm

b.

Perimeter of that shape = 2 × (1/2 π × d) + 14 + 14

                                        = 2 × (1/2× 22/7 × 7) + 14 + 14 = 50cm

c.

Perimeter of that shape = 1/2 π × d + 3 +3

                                        =(1/2× 22/7 × 2.8) + 3 + 3 = 10.4cm