Question

perimeter of a eqilateral triangle is 18cm find its area

Answer 1

Equilateral triangle

Solve for 

area

A

≈

15.59

cm²

Answer 2

the perimeter=18 cm.
the length of one side=18/3cm. or 6cm.
the area of an eqilateral triangle is root 3/4 r square.
so, the answer is
$\sqrt{3 } \div 4 \times 6 \times 6$
that is equal to
$9 \sqrt{2}$
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