Q3. There is a slide in a park. One of its side walls has been painted in some colour with a message “KEEP THE PARK GREEN AND CLEAN” (see Fig. 12.10 ). If the sides of the wall are 15 m, 11 m and 6 m, find the area painted in colour.
Given the sides of the triangle are:
So, the semi perimeter of the triangle will be:
Therefore, Heron's formula will be:
Hence, the area painted in colour is .