There is a slide in a park. One of its side walls has been painted in some color 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 color.

Question

Philoid · Accepted Answer

The sides of the triangle are 15 m, 11 m and 6 m.

Parameter of the triangular walls = 3(side)

= 15 + 11 + 6

= 32 m

Semi perimeter of triangular walls(s) =

= 16 m

Using Heron’s formula,

Area of the advertisement =

=

= 20 m²