Question

Find the area of semicircle with diameter 10 CM ( take r = 3:14)​

Answer 1

$Radius \:of\: circle = 10 ÷ 2$

$= 5$

$Area\: of\: semicircle = πr² \frac{1}{2}$

$= 3.14 × 5² × \frac{1}{2}$

$= 3.14 × 25 × \frac{1}{2}$

$= 78.5×\frac{1}{2}$

$= 39.25\: cm²$

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Answer 2

Answer:

The area of the semicircle is 39.25 cm².

Step-by-step-explanation:

We have given that the diameter of a semicircle is 10 cm.

We have to find the area of the semicircle.

Now, we know that,

Area of semicircle = Area of circle / 2

⇒ Area of semicircle = ( π r² ) / 2

⇒ Area of semicircle = [ π ( d / 2 )² ] / 2

⇒ Area of semicircle = [ π ( 10 / 2 )² ] / 2

⇒ Area of semicircle = [ π * ( 10 / 2 ) * ( 10 / 2 ) ] / 2

⇒ Area of semicircle = ( π * 5 * 5 ) / 2

⇒ Area of semicircle = ( π * 25 ) / 2

⇒ Area of semicircle = 3.14 * 25 ÷ 2

⇒ Area of semicircle = 3.14 * 12.5

⇒ Area of semicircle = 39.25 cm²

∴ The area of the semicircle is 39.25 cm².