Question

EXERCISE 12.1
A traffic signal board, indicating 'SCHOOL AHEAD'. is an equilateral triangle with
side a'. Find the area of the signal board, using Heron's formula. If its perimeter is
180 cm, what will be the area of the signal board?​

Answer 1

1.find the s

2.then put the value in the formula.

3.then finds its perimeter.

4.then the area of equilateral triangle.