Interior/Exterior Angles of Triangles

Front

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

Back

180 degrees

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal.

Front

If one angle of a triangle is 45 degrees and another is 95 degrees, what is the measure of the third angle?

Back

The third angle is 40 degrees.

Front

What is an exterior angle of a triangle?

Back

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

Front

How do you calculate the measure of an exterior angle?

Back

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

Front

What is the relationship between interior and exterior angles of a triangle?

Back

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

Front

What is the measure of each angle in an equilateral triangle?

Back

Each angle in an equilateral triangle measures 60 degrees.

Front

What is the definition of corresponding angles?

Back

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

Front

If two angles are supplementary, what is their sum?

Back

Their sum is 180 degrees.

Front

What is the measure of an angle that is complementary to a 36-degree angle?

Back

The measure is 54 degrees.