Lesson on Angles

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal in measure.

Front

What is a supplementary angle?

Back

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

Front

What is the measure of supplementary angles?

Back

Supplementary angles measure 180 degrees.

Front

What are vertical angles?

Back

Vertical angles are pairs of angles formed when two lines intersect, and they are equal in measure.

Front

What is an angle bisector?

Back

An angle bisector is a ray that divides an angle into two equal parts.

Front

If ray BD is the angle bisector of

Back

Front

What are complementary angles?

Back

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

Front

What is the relationship between alternate interior angles?

Back

Alternate interior angles are equal when two parallel lines are cut by a transversal.

Front

What are corresponding angles?

Back

Corresponding angles are angles that are in the same position on two parallel lines in relation to a transversal.

Front

If two angles are supplementary and one measures 70 degrees, what is the measure of the other angle?

Back

The other angle measures 110 degrees.