the perimeter of an equilateral triangle is 72 m. find its area.
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perimeter of an equilateral triangle = 72 m
3a = 72
a = 24
area of equilateral triangle = √3/4 a²
= √3/4 × 24×24
= √3 × 6 × 24
= 144√3m²
= 249.12 m²
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