#048 Triangle Sum Theorem/Exterior Angles Practice

Front

What is the Triangle Sum Theorem?

Back

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

Front

If one angle of a triangle measures 75° and another measures 19°, what is the measure of the third angle?

Back

86°

Front

What is an exterior angle of a triangle?

Back

An exterior angle is formed by one side of a triangle and the extension of an adjacent side. It is equal to the sum of the two remote interior angles.

Front

What is the measure of the missing angle if two angles of a triangle measure 30° and 110°?

Back

40°

Front

Will the angles 30°, 60°, and 90° form a triangle?

Back

Yes, they will form a triangle because their sum is 180°.

Front

What is 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.

Front

If one angle of a triangle is 90°, what type of triangle is it?

Back

It is a right triangle.

Front

What is the relationship between an exterior angle and its adjacent interior angle?

Back

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

Front

If a triangle has angles measuring 40° and 70°, what is the measure of the third angle?

Back

70°.

Front

What is the definition of an interior angle?

Back

An interior angle is an angle formed by two sides of a triangle that meet at a vertex.