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
Verified Correct Answer: D.
Step-by-Step Mathematical Solution
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
Source: WAEC / JAMB / NECO Classroom Archive (Record #42139)