The area of the equilateral triangle

Find the area of an equilateral triangle if it has side l = 6 cm.

Fill in here3 cm2

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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