Question

if the radius of a circle is 2.5 cm, what is the area of its semi circle?

Answer 1

Answer:

9.82 cm^2

Step-by-step explanation:

Formula related to the question : -

\boxed{\mathsf{ Area\:of\:semi-circle= \dfrac{1}{2} \pi r^2}}

Areaofsemi−circle=

2

1

πr

2

In the given question, radius of the circle = 2.5 cm

On the basis of the formula given above.

Area of its semi-circle = \dfrac{1}{2}\times\dfrac{22}{7} \times (2.5\:cm)^2

2

1

×

7

22

×(2.5cm)

2

Area of its semi - circle = \dfrac{11}{7} \times 2.5 \times 2.5\:cm^2

7

11

×2.5×2.5cm

2

Area of its semi - circle = 9.82 cm^2 ( approx )

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Answer 2

Answer:

Area of semi circle = (π × r^2) / 2

= 22/7 × 2.5^2 / 2

=9.82 cm^2

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