Transversal Vocab

Front

What are vertical angles?

Back

Vertical angles are angles that are opposite each other when two lines intersect. They are always congruent (equal in measure).

Front

What are supplementary angles?

Back

Supplementary angles are two angles whose sum equals 180 degrees.

Front

What is the relationship of alternate interior angles?

Back

Alternate interior angles are angles that lie on opposite sides of the transversal and inside the two lines. They are congruent when the lines are parallel.

Front

What are corresponding angles?

Back

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

Front

What are alternate exterior angles?

Back

Alternate exterior angles are angles that lie on opposite sides of the transversal and outside the two lines. They are congruent when the lines are parallel.

Front

What is the sum of angles on a straight line?

Back

The sum of angles on a straight line is always 180 degrees.

Front

What is the definition of acute angles?

Back

Acute angles are angles that measure less than 90 degrees.

Front

What is the definition of obtuse angles?

Back

Obtuse angles are angles that measure more than 90 degrees but less than 180 degrees.

Front

What are same-side interior angles?

Back

Same-side interior angles are angles that lie on the same side of the transversal and inside the two lines. They are supplementary when the lines are parallel.

Front

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

Back

If two angles are vertical, their measures are equal.