Question

find the perimeter of the following figure

Answer 1

Three semicircles of radii 28, 14 and 14 each

Perimeter = 2 π r

2 x 3.14 x 14 = 87.92 cm

But we need to find half perimeter

so, 87.92 ÷ 2 = 43.96

But there is another semi Circle of same radii

So, 43.96 x 2 = 87.92 cm (perimeter of 2 small semi circles)

Now in bigger semi circle

2 x 3.14 x 28
= 175.84
semi circle , so 175.84 ÷ 2 = 87.92cm

so total perimeter = 87.92 + 87.92 = 175.85 cm