Question

Find the area of semicircle whose diameter is 40 cm and also write the formula of area of semicircle?

Answer 1

Answer:

diameter = 40cm

radius=20cm

AREA=1/2 *πr²

          = 1/2 *3.14 * 20*20

           = 314/100*10*20

           = 314/100*200

           =314*2

            =628 cm²

Step-by-step explanation:

Answer 2

SOLUTION:-

Given:

•Diameter of the semicircle= 40cm.

To find:

The area of the semicircle &

The formula of the area of semicircle.

Explanation:

Formula: Area= πr²/2

Radius of the semicircle: d/2

=) 40/2

=) 20cm

Now,

$Area = \frac{\pi {r}^{2} }{2} \\ \\ = > \frac{3.14 \times 20cm \times 20cm}{2} \\ \\ = > 3.14 \times 10cm \times 20cm \\ \\ = > 628 {cm}^{2}$

Thus,

The area of semicircle is 628cm².

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