Geometry - Chapter 4 Congruent Triangles Review

Front

What are the base angles in an isosceles triangle?

Back

In an isosceles triangle, the base angles are the angles opposite the equal sides. They are congruent.

Front

State the Triangle Sum Theorem.

Back

The Triangle Sum Theorem states that the sum of the interior angles of a triangle is always 180 degrees.

Front

If two angles of a triangle are congruent, what can be said about the sides opposite those angles?

Back

The sides opposite the congruent angles are also congruent.

Front

How do you classify a triangle with all sides of different lengths?

Back

A triangle with all sides of different lengths is classified as a scalene triangle.

Front

What is the definition of congruent triangles?

Back

Congruent triangles are triangles that are identical in shape and size, meaning all corresponding sides and angles are equal.

Front

What is the relationship between the angles in an isosceles triangle?

Back

In an isosceles triangle, the angles opposite the equal sides are congruent.

Front

If a triangle has angles measuring 70° and 50°, what is the measure of the third angle?

Back

The third angle measures 60° (70° + 50° + x = 180°, so x = 180° - 120° = 60°).

Front

What is the formula to find the measure of an exterior angle of a triangle?

Back

The measure of an exterior angle is equal to the sum of the measures of the two non-adjacent interior angles.

Front

In triangle ABC, if AB ≅ AC, what type of triangle is it?

Back

Triangle ABC is an isosceles triangle.

Front

What does it mean for two angles to be complementary?

Back

Two angles are complementary if the sum of their measures is 90 degrees.