Question

Find the area and perimeter of the following semi-circle :

Radius= 1.4 cm

Answer 1

Area of the semi-circle = `1/2 pi "r"^2`

`= 1/2 xx 22/7 xx 1.4 xx 1.4`

= 3.08 cm²  

Perimeter of the semi-circle = (πr + 2r) 

`= (22/7 xx 1..4) + (2 xx 1.4)`

= 7.2 cm

Therefore, Area= 3.08 cm² and Perimeter= 7.2 cm.