Question

radius of a semicircle is 7 cm what is the area of the semicircle​

Answer 1

Answer:

The formula for area of a semicircle is:

A

=

1

2

π

r

2

, where

A

=

area,

π

=

22

7

, and

r

=

radius.

With the given data, we write:

A

=

1

2

×

22

7

×

(

7 cm

)

2

A

=

1

2

×

22

11

7

×

7

×

7 cm

2

A

=

77 cm

2

Answer 2

Answer:

Hence, area of semicircle will be 77 Sq. cm

Step-by-step explanation:

In context to question asked,

We have to determine the area of semicircle

As per data given in the question,

We have,

Radius of semicircle = 7 cm

As we know that,

Area of semicircle is half the area of circle.

So, formula for finding area of semicircle will be $\frac{1}{2} \Pi r^2$

So, for finding the area of semicircle we will put the value of radius of semicircle in above formula

Thus we will get,

$Area = \frac{1}{ 2}\Pi r^2\\=\frac{1}{2} \times \frac{22}{7} \times 7^2\\=\frac{1}{2} \times \frac{22}{7} \times 49 =11 \times 7= 77\:cm^2$