Question

is the following statement a good definition? an equilateral triangle is a triangle with at least two angles congruent. yes no

Explanation:

A good definition should be precise and only describe the specific term. A triangle with at least two congruent angles is an isosceles triangle (by the Isosceles Triangle Theorem, which states that if a triangle has at least two congruent angles, it has at least two congruent sides). An equilateral triangle has all three angles congruent (and all three sides congruent), but the definition "a triangle with at least two angles congruent" is too broad because it includes isosceles triangles which are not necessarily equilateral. So this is not a good definition for an equilateral triangle.

Answer:

no