Question

(0) its perimeter,
(ii) its area.
(a)

The circular portions of the following figures
semicircles. For each of the following figures, if length is 18cm then find the perimeter and area
​

Answer 1

Answer:

In physics, a rigid body is a solid body in which deformation is zero or so small it can be neglected. The distance between any two given points on a rigid body remains constant in time regardless of external forces or moments exerted on it. A rigid body is usually considered as a continuous distribution of mass.

Answer 2

$hello \: mate$

______________________________________

Perimeter =

$2.\pi4.5 + \pi9 \\ = 18\pi \: cm$

Area =

$2 .\pi \div 2(4.5)2 + \pi \div 2 \: 81 \\ = \pi(20.25) + \pi40.5 \\ = 60.75\pi \: cm$

______________________________________

Kindly refer the above attachment for better understanding.

I hope my answer helps you....✌