A wire was shaped to form a square of area 81cm\(^2\). An equilateral triangle was formed by the same wire,What is the length of a side of the triangle formed?

A.

3cm

B.

6cm

C.

9cm

D.

12cm

E.

27cm

View answer & explanation

Correct answer is D

Area of a square = L X L = 81

: L = 9

Perimeter of square = 4 X L 

 4 X 9 = 36cm

An equilateral triangle with equal sides:

 36/3 = 12cm

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