Question

find the area of semi-circle of radius 3.5 cm.

Answer 1

Solutions :-

Given :

Radius (r) of circle = 3.5 cm

Find the area of semicircle :-

Area of semicircle = (π r²)/2 square unit
= (22/7 × 3.5²)/2 cm²
= (22 × 1.75)/2 cm²
= 38.5/2 cm²
= 19.25 cm²

Hence,
Area of semicircle = 19.25 cm²

Answer 2

Here is your solution

Given :-

Radius of circle = 3.5 cm

To Find the area of semicircle :-

we know that

Area of semicircle = 1/2(π r²) m^2

=> 1/2(22/7 × 3.5²)cm²

=> 1/2(22 × 1.75)cm²

=> 38.5/2 cm²

=> 19.25 cm²

Hence,

Area of semicircle = 19.25 cm²

Hope it helps you