Calculate the area and the height of an equilateral triangle whose perimeter is 60 cm.
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Each side of triangle is 60/3 = 20 cm
Hence area of equilateral triangle is given by
A = √3/4 × 20²
= 100√3
=173.2 sq.cm
The height of the triangle is given by
1/2 × 20 × h = 173.2
h = 17.32 cm
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