# How are isosceles and equilateral triangles the same?

*Isosceles triangles* are those that have two sides equal in length.

*Equilateral triangles* are those that have all three sides equal.

These are not the same.

Any equilateral triangle (it has all 3 equal sides) is isosceles (that requires only 2 equal sides), but not all isosceles triangles (it has 2 equal sides) are equilateral (that requires all 3 equal sides).

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Isosceles and equilateral triangles are both types of triangles that have at least two sides of equal length. In an isosceles triangle, two sides are of equal length, while in an equilateral triangle, all three sides are of equal length. Additionally, both types of triangles have at least two congruent angles.

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