Angles

Front

What are congruent angles?

Back

Congruent angles are angles that have the same measure.

Front

Identify the angles that are congruent: ∠5 and ∠8, ∠3 and ∠5, ∠6 and ∠4, ∠3 and ∠4.

Back

∠5 and ∠8 are congruent.

Front

What is the sum of angles in a triangle?

Back

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

Front

What is a supplementary angle?

Back

Supplementary angles are two angles whose measures add up to 180°.

Front

What is a complementary angle?

Back

Complementary angles are two angles whose measures add up to 90°.

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines cross. They are always congruent.

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 are alternate interior angles?

Back

Alternate interior angles are angles that lie between two parallel lines on opposite sides of a transversal.

Front

What are alternate exterior angles?

Back

Alternate exterior angles are angles that lie outside two parallel lines on opposite sides of a transversal.

Front

If one angle measures 60°, what is the measure of its supplementary angle?

Back

The supplementary angle measures 120°.