Question

the perimeter of an equilateral triangle is 72 cm. find its height

Answer 1

72=x+x+x

72=3x

24=x=side of Δ

by pythagoras theorem,

24²=h²+12²

576=h²+144

576-144=h²

432=h²

√432=h

12√3=h

height =12√3cm

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