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They are the same size

Q: What is the relationship between the base angles of an isosceles triangle?

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The two acute angles are always equal.

An isosceles triangle has three interior angles whose base angles are equal.

If it doesn't have congruent angles, it's not an isosceles triangle.

Any type of triangle will have angles that add up to 180o. yet two angles of an isosceles triangle are equal

The Isosceles Triangle Theorem:If two sides of a triangle are congruent, then the angles opposite the sides are congruent.The Converse of Isosceles Triangle Theorem:If two angles of a triangle are congruent, then the sides opposite those angles are congruent.

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They are of the same lengths

An Isosceles Triangle is a triangle with all angles less than 90o So there are no obtuse angles (between 90o to 180o).

The base angles of an isosceles triangle are congruent.

The two acute angles are always equal.

The base angles of an isosceles triangle are the two angles that are equal to each other. They can be between 89.999...o and 0.000000..01o.

The base angles of an isosceles triangle are congruent. The vertex angle of an isosceles triangle is not necessarily congruent to the base angles.

In an isosceles triangle, two of the angles are the same.

The base angles of an isosceles triangle are the two angles with the same measure, each formed by the intersection between the base of the triangle and one of the two legs.

An isosceles triangle has three interior angles whose base angles are equal.

there are three angles on an isosceles triangle

If it doesn't have congruent angles, it's not an isosceles triangle.

No. They are usually different.An isosceles triangle has two equal angles and two equal adjacent sides. An isosceles triangle with three 60° angles is the equilateral triangle.Only one isosceles triangle, which has two 45° angles, includes a right angle and is called an isosceles right triangle.