If It Is an Equilateral Triangle Then It Is Isosceles

Some mathematicians define an isosceles triangle to have exactly two equal sides. All three angles are congruent and are equal to 60 degrees.

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Properties of Equilateral Triangle.

. An equilateral triangle is a triangle whose all three sides are equal and each interior angle measures 60 o. Suppose ABC is an equilateral triangle then as per the definition. Isosceles triangle and.

This fact is the content of the isosceles triangle theorem which was known by Euclid. All three sides are equal. AB BC AC where AB BC and AC are the sides of the equilateral triangle.

An isosceles triangle is a triangle whose two sides are equal. A scalene triangle is a triangle whose all three sides are unequal. An equilateral triangle is also a regular polygon with all angles measuring 60.

An isosceles triangle also has two angles of the same measure namely the angles opposite to the two sides of the same length. A B C 60 Based on sides there are other two types of triangles.

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