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 figure). If the sides of the wall are 15 m, 11 m and 6 m, find the area painted in colour.
Length of first side of triangle m
Length of second side of triangle m
Length of third side of triangle m
Semi-perimeter of triangle m
Using Heron's formula to find area of triangle, we get
Area of triangle