Find the area (in cm²) of an equilateral triangle whose sides are 18 cm.

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Accepted Answer

The formula for the area of an equilateral triangle with side length 'a' is (sqrt(3)/4) * a^2.

Given, a = 18 cm.

Area = (sqrt(3)/4) * (18)^2
     = (sqrt(3)/4) * 324
     = 81 * sqrt(3) cm².

Hence, the correct answer is 81√3.

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Answer

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