Find the radius of the inscribed circle of the triangle to the nearest
two decimals, given that cm, cm, and .
Firstly, we need to find the length of side . We do this using the cosine rule.
Using this value, we can find the semi-perimeter, then apply Heron's formula to calculate the area of the triangle.
Hence, the area, , of the triangle is given by:
Remember that the radius, , of the inscribed circle is given by the area of the triangle divided by the semi-perimeter .