Question

Find the area of semicircle whose radius is 7
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Answer 1

Answer:

(22/7)*(7^2)*(1/2)

154*(1/2)

77

Answer 2

Answer:

77cm²

Step-by-step explanation:

Area of a circle is $\pi r^{2}$

∴ area of a semi circle is $\frac{1}{2}$ × $\pi r^{2}$

radius = 7cm

$\pi$ = $\frac{22}{7}$

area: $\frac{1}{2}$ × $\frac{22}{7}$ × $7$ × $7$

area = 7 × 11

= 77cm²