## Isosceles Triangle theorem

### The Isosceles Triangle Theorem states that in an isosceles triangle, if two sides are congruent, then the two opposite angles are also congruent

The Isosceles Triangle Theorem states that in an isosceles triangle, if two sides are congruent, then the two opposite angles are also congruent. In simpler terms, if two sides of a triangle are equal in length, then the angles opposite those sides will also be equal.

To understand this theorem, let’s consider an isosceles triangle with sides AB, AC, and BC. If side AB is equal in length to side AC, we can say that AB ≅ AC. According to the Isosceles Triangle Theorem, the angles opposite these sides, which are angles B and C, will also be congruent, denoted as ∠B ≅ ∠C.

In general, the theorem can be stated as follows:

If ΔABC is an isosceles triangle with sides AB ≅ AC, then angles ∠B ≅ ∠C.

This theorem is very helpful in solving various problems involving isosceles triangles, such as finding missing angles or lengths of sides. By knowing the lengths of two sides of an isosceles triangle, we can determine the measures of the angles without having to rely on any additional information.

Overall, the Isosceles Triangle Theorem is a fundamental concept in geometry that provides insights into the relationships between sides and angles in isosceles triangles.

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