Question

find the perimeter for the following figures Pi is equals to 3.14​

Answer 1

i)

Perimeter of a circle=2πr

$\implies \: perimeter \: of \: semi \: circle \\ = \pi \: r$

radius of the circle =6cm

$peimeter \: of \: the \: figure \\ = \pi \: r + 2r \\ = 3.14 \times 3 + 2 \times 3 \\ = 9.42 + 6 \\ = 15.42cm$

ii)

radius of the semi- circles= 8cm

breadth of the rectangle=3cm

perimeter of the figure= πr + πr + 2b

$\implies \: perimeter = 2\pi \: r + 2b \\ = 2 \times 3.14 \times 8 + 2 \times 3 \\ = 50.24 + 6 \\ = 56.24cm$