Question

Find the area of Half circle (semi circle) of radius 2.8 m.​

Answer 1

$4.4 { {}^{} }^{}$

Answer 2

12.32 m²

Step-by-step explanation:

Given:

• Radius of the circle(r) = 2.8 m

To find:

• Area of semi circle

Solution:

We know that,

⇒ Area of circle = πr²

We know that, when the circle is cut into half, it is called as semi-circle. Since, in a semi-circle, the circle is halved, its area and perimeter becomes half of that of the actual circle.

Therefore,

⇒ Area of semi-circle = πr²/2

⇒ Area of semi-circle = (22/7×2.8×2.8)/2

⇒ Area of semi-circle = (172.48/7)/2

⇒ Area of semi-circle = 24.64/2

⇒ Area of semi-circle = 12.32 m²

Hence, the area of semi circle is 12.32 m².