Interior and Exterior Angles of Triangles

Front

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

Back

180 degrees.

Front

What are remote interior angles in relation to an exterior angle?

Back

The two interior angles that are not adjacent to the exterior angle.

Front

If one angle of a triangle is 50 degrees and another is 60 degrees, what is the measure of the third angle?

Back

70 degrees.

Front

What is an exterior angle of a triangle?

Back

An angle 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 remote interior angles.

Front

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

Back

The sum of the measures of the interior angles is equal to the sum of the measures of the exterior angles.

Front

What is the definition of an acute angle?

Back

An angle that measures less than 90 degrees.

Front

What is the definition of an obtuse angle?

Back

An angle that measures more than 90 degrees but less than 180 degrees.

Front

What is the definition of a right angle?

Back

An angle that measures exactly 90 degrees.

Front

If angle A is 40 degrees and angle B is 70 degrees, what is angle C in triangle ABC?

Back

Angle C is 70 degrees.