Question

Find the Ares of a semi circle whose radius is 2.4 cm​

Answer 1

72/25
`\pi` cm² or 9.047786842... cm²

Explanation:

Area of whole circle is
`\pi r^(2)`

`\pi`×2.4² = 144/25
`\pi` cm² or 18.09557368... cm²

Since it is a semi-circle, divide this value by 2 (or multiply by 0.5, either way, your halving it):

144/25
`\pi` ÷ 2 = 72/25
`\pi` cm² or 9.047786842... cm²

Answer 2

Explanation:

area of semi circle=πr^2/2

=3.14*(2.4)^2/2

=3.14*5.76/2

=18.0864/2

=9.0432 cm^2