31. If perimeter of a equilateral triangle is 24 cm then find its area
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Answer:
Perimeter of equilateral triangle = 24cm
( there are three equal sides in an e
quilateral triangle )
Each side = 24 / 3 = 8cm
Area of an equilateral triangle = root 3 / 4 s square
= root 3 / 4 × 8 square
= root 3 / 4 x 64
= root 3 × 16
= 16 root 3
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