Question

Proof that each angle of an equilateral triangle is 60 degree

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Answer 1

Bonjour!

The Equilateral Triangle has 3 equal angles. The total sum of the interior angles of a triangle is 180 degrees, therefore, every angle of an equilateral triangle is 60 degrees.

It is a 3 sided regular polygon. The following corollaries of equilateral triangles are derived from the properties of an equilateral triangle and the Isosceles triangle theorem.