Question

Work out the area of a semi circle with a radius of 3cm
give your answer in terms of pi

Answer 1

The area of semicircle is
`4.5 \pi\ cm^2`

Solution:

Given that,

We have to find the area of a semi circle with a radius of 3 cm

The area of semicircle is given as:

`Area\ of\ semicircle = ( \pi r^2)/(2)`

Where, r is the radius

From given,

r = 3 cm

Substituting the values we get,

`Area\ of\ semicircle = ( \pi * 3^2)/(2)\\\\Area\ of\ semicircle = ( \pi * 9)/(2)\\\\Area\ of\ semicircle = 4.5 \pi`

Thus the area of semicircle is
`4.5 \pi\ cm^2`