Interior and exterior angles of triangles

Front

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

Back

The sum of the interior angles of 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 the relationship between an exterior angle and the remote interior angles?

Back

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

Front

If one angle of a triangle measures 60 degrees, what is the maximum possible measure of the other two angles?

Back

The maximum possible measure of the other two angles is 120 degrees, since the sum must equal 180 degrees.

Front

What is an interior angle of a triangle?

Back

An interior angle of a triangle is an angle formed by two sides of the triangle that lies inside the triangle.

Front

How do you find the measure of an unknown angle in a triangle?

Back

To find the measure of an unknown angle, subtract the sum of the known angles from 180 degrees.

Front

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

Back

In an equilateral triangle, each angle measures 60 degrees.

Front

What is the definition of a corresponding angle?

Back

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

Front

What is the measure of angle x if the other two angles in a triangle are 45 degrees and 90 degrees?

Back

Angle x measures 45 degrees.

Front

What is the definition of a remote interior angle?

Back

A remote interior angle is an interior angle of a triangle that is not adjacent to a given exterior angle.