Question 68
Twelve sticks, each of length one unit, are used to form an equilateral triangle. The area of the triangle is:
Solution
12 sticks of 1 unit each = 12 units
Side of equilateral triangle made by 12 units = 4 cm
Area of equilateral triangle = $$\frac{\sqrt{3}}{4}\times a^{2}= \frac{\sqrt{3}}{4}\times 4^{2}=4\sqrt{3}$$
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