4.5.2 Angle Relationships in Triangles

Front

What is the sum of the interior angles in a triangle?

Back

The sum of the interior angles in a triangle is always 180 degrees.

Front

Define an exterior angle of a triangle.

Back

An exterior angle of a triangle is formed by one side of the triangle and the extension of an adjacent side.

Front

What is a corresponding angle?

Back

Corresponding angles are angles that are in the same position on two different parallel lines cut by a transversal.

Front

If two angles are complementary, what is their sum?

Back

The sum of two complementary angles is 90 degrees.

Front

If two angles are supplementary, what is their sum?

Back

The sum of two supplementary angles is 180 degrees.

Front

What is the relationship between the remote interior angles and an exterior angle?

Back

The exterior angle is equal to the sum of the two remote interior angles.

Front

How do you find the measure of an unknown angle in a triangle if you know the measures of the other two angles?

Back

Subtract the sum of the known angles from 180 degrees.

Front

What is the definition of similar triangles?

Back

Similar triangles are triangles that have the same shape but may differ in size; their corresponding angles are equal and their corresponding sides are proportional.

Front

What is the measure of angle B if angle A is 89 degrees and angle C is 62 degrees?

Back

Angle B measures 29 degrees (180 - 89 - 62 = 29).

Front

What is the definition of an interior angle?

Back

An interior angle is an angle formed between two sides of a triangle that is located inside the triangle.