(Honors) Triangle Angle Sum, Ext Angle Thm, Isos & Equil Trian

Front

What does the Triangle Sum Theorem state?

Back

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

Front

What is the measurement of the missing angle in a triangle if the other two angles are 50° and 100°?

Back

30°

Front

If two angles of a triangle measure 45° and 45°, what is the measure of the third angle?

Back

90°

Front

In an isosceles triangle, if the base angles are each 30°, what is the measure of the vertex angle?

Back

120°

Front

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

Back

Each angle measures 60°.

Front

If an isosceles triangle has a vertex angle of 40°, what are the measures of the base angles?

Back

Each base angle measures 70°.

Front

What is the Exterior Angle Theorem?

Back

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

Front

If one exterior angle of a triangle measures 130°, what are the measures of the two non-adjacent interior angles?

Back

The sum of the two non-adjacent interior angles is 130°.

Front

In a triangle, if one angle measures 60° and another measures 80°, what is the measure of the third angle?

Back

40°.

Front

If a triangle has angles measuring 70° and 50°, what is the measure of the third angle?

Back

60°.