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Definition:

An ____ triangle is a triangle with two congruent sides.

Isosceles Triangle Theorem

A. In a triangle, if two ____ are congruent, the angles opposite them are also congruent.

B. In a triangle, if two ____ are congruent, the sides opposite them are also congruent.

Answer Key : isosceles , sides , angles, congruent , scalene

1 Answer

9 votes

Answer:

Isosceles, sides, angles

Explanation:

Isosceles triangles have two sides the same size.

The theorems help us to know, A. If two sides are the same then the opposite angles are the same.

And B if two angles are the same the opposite sides are the same.

Not used: congruent (means same shape and size) nor scalene(describes a triangle with three different side lengths)

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