Angle Pair & Triangle Sum

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°.

Front

What are supplementary angles?

Back

Supplementary angles are two angles that add up to 180°.

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect, and they are always congruent.

Front

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

Back

Each angle in an equilateral triangle measures 60°.

Front

What are complementary angles?

Back

Complementary angles are two angles that add up to 90°.

Front

If one angle measures 70°, what is the measure of its supplementary angle?

Back

The supplementary angle measures 110° (180° - 70° = 110°).

Front

If two angles are complementary and one measures 30°, what is the measure of the other angle?

Back

The other angle measures 60° (90° - 30° = 60°).

Front

What are corresponding angles?

Back

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

Front

What is the Triangle Sum Theorem?

Back

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

Front

If two angles are vertical angles, what can we say about their measures?

Back

Vertical angles are congruent, meaning they have equal measures.