Answers

2016-04-05T13:37:08+05:30
Circumference of the circle = 2πr = 2×22/7 × 21 = 132 cm
perimeter of equilateral triangle = 132 cm
side of equilateral triangle is = 44 cm
area of equilateral triangle  = √3/4 × a²
area = √3/4 × 44 ×44
are = 484√3
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