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A traffic signal board, indicating SCHOOL AHEAD, is an equilateral triangle with side ` a '` . Find the area of the signal board, using Herons formula. If its perimeter is `180 c m ,\ ` what will be the area of the signal board?

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A traffic signal board, indicating ‘SCHOOL AHEAD’, is an equilateral triangle with side ‘a’. The area of the signal board, using Heron’s formula if its perimeter is `180` cm is `900√3 cm^2`.
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