if the area of an equilateral triangle is 36 square root 3 cm square find the length of its side and its perimeter
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Area of equilateral triangle = √3/4 a² where a is side length.
=>√3/4 a² = 36 √3
=> a² = 36 × 4 = 144
=> a = 12 cm.
=> perimeter = 3×side(for equilateral triangle) = 36 cm
=>√3/4 a² = 36 √3
=> a² = 36 × 4 = 144
=> a = 12 cm.
=> perimeter = 3×side(for equilateral triangle) = 36 cm
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