Area of my hat
Level
1
My hat is shaped like an equilateral triangle. One of its sides are 3 units long. What is the area of my hat?
The answer is 3.9.
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1 solution
Area of an equilateral triangle is given by 4 3 a 2 where a is the side length.
Therefore, area of triangle with side 3 units is 4 3 × 9 ≈ 3 . 9