Question

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.). If the sides of the wall are 15 m, 11 m and 6m, find the area painted in colour.

Answer 1

The sides of the triangular wall be 15m, 11m and 6m.
$s=\frac{15m+11m+6m}{2}=16m$
Area of the wall = $\sqrt{16\times (16-15)\times (16-11)\times (16-6)}{m}^2$
$=\sqrt{16\times 1\times 5\times 10}{m}^2$
$=20\sqrt{2}{m}^2$