Question

a traffic signal board indicating school ahead is an equilateral triangle with side a then height of the traffic signal is

Answer 1

Step-by-step explanation:

Given Perimeter =180 cm

Semi-perimeter s=

2

180

s=90 cm

Since all sides of equilateral triangle are equal

So,

Perimeter =180

a+a+a=180

3a=180

a=60 cm

Area of triangle =

s(s−a)(s−b)(s−c)