NCERT Exercise 10.1 Q1 - Heron's Formula
Question: A traffic signal board, indicating 'SCHOOL AHEAD', is an equilateral triangle with side a. Find the area using Heron's formula. If its perimeter is 180 cm, what is the area?
Answer: Area = (√3/4)a². For perimeter 180 cm, area = 900√3 cm².
Full step-by-step NCERT solution with diagrams on Something by Zero.