What triangle has at least two congruent sides called?

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Multiple Choice

What triangle has at least two congruent sides called?

Explanation:
Two sides that are the same length define an isosceles triangle. The name comes from the idea of equal legs, so whenever a triangle has two congruent sides, it fits this category (and if all three sides are equal, it’s still isosceles—often called equilateral as a special case). The other options refer to shapes with more than three sides or to polygons where all sides and angles are equal, not to a triangle with two equal sides. So the correct term is an isosceles triangle.

Two sides that are the same length define an isosceles triangle. The name comes from the idea of equal legs, so whenever a triangle has two congruent sides, it fits this category (and if all three sides are equal, it’s still isosceles—often called equilateral as a special case). The other options refer to shapes with more than three sides or to polygons where all sides and angles are equal, not to a triangle with two equal sides. So the correct term is an isosceles triangle.

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