A traffic signal board, indicating â€˜SCHOOL AHEADâ€™, is an equilateral triangle with side â€˜aâ€™.
Channel: Doubtnut
Date: 2020-07-05

A traffic signal board, indicating â€˜SCHOOL AHEADâ€™, is an equilateral triangle with side â€˜aâ€™. Find the area of the signal board, using Heronâ€™s formula. If its perimeter is 180 cm, what will be the area of the signal board?