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If the area of the equilateral triangle is cm2, find its perimeter.
Given,
Area of the equilateral triangle = 36cm2
Let us assume a be the length of the side of an equilateral triangle
We know that,
Area of an equilateral triangle = sq units
36 =
a2 =
a2 = 36 × 4
a2 = 144
a = 12 cm
We know that,
Perimeter of an equilateral triangle = 3 × a
= 3 × 12
= 36 cm
Hence, perimeter of the given equilateral triangle is 36 cm.