TBQ - Area of equilateral triangle — task. Maths TNSB Mentoring, Class 9.

The perimeter of an equilateral triangle is \(30 cm\). The area is:

\(12 \sqrt{3}\) \(cm^2\)
\(10 \sqrt{3}\) \(cm^2\)
\(15 \sqrt{3}\) \(cm^2\)
\(25 \sqrt{3}\) \(cm^2\)

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