Height in equilateral triangle

Find the height of an equilateral triangle whose perimeter is equal to 18√3 cm.

Fill in here cm

Remember !

Properties of the equilateral triangle.

The equilateral triangle has equal sides and angles and the angle is 60°

The perimeter of an equilateral triangle is equal to the sum of the sides.

The equilateral triangle has all the congruent midlines.

Abbreviations: A - equilateral triangle area and h - equilateral triangle height.

A =
a23/4

h =
a√3/2

equilateral triangle

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