Find the area of a semi-circle with a radius of 3.5 metres. (answer to nearest whole number)
The formula for the area of a semi-circle is:
A = (πr^2)/2
where r is the radius of the semi-circle.
Substituting r = 3.5 m gives:
A = (π(3.5)^2)/2
= 6.06 m^2 (to the nearest whole number)
Therefore, the area of the semi-circle is approximately 6 square metres.