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 150 cm, what will be the area of the signal board?
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Answer:
side of equilateral triangle is 50cm
height of equilateral triangle is 43.30
area = 1/2bh = 1/2×50×43.30 = 1082.53 sq cm
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