how to prove that a triangle is an equilateral traingle and isosceles triangle
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Let's discuss the properties of Equilateral Triangle.
The Equilateral Triangle has 3 equal sides.
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.
If a triangle has two congruent angles, then the sides opposite those angles are congruent. In other words, iso-angular triangles are iso-lateral (isosceles). This is the converse of the isosceles triangle theorem.
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