Transversals and Triangles

Front

What is a transversal?

Back

A transversal is a line that intersects two or more lines at different points.

Front

What are alternate interior angles?

Back

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

Front

What is the angle–angle (AA) criterion for triangle similarity?

Back

The AA criterion states that if two angles of one triangle are congruent to two angles of another triangle, the triangles are similar.

Front

What are corresponding angles?

Back

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

Front

If two angles are supplementary, what is the sum of their measures?

Back

The sum of the measures of supplementary angles is 180 degrees.

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 degrees.

Front

How do you find the measure of an angle when given its supplement?

Back

To find the measure of an angle's supplement, subtract the angle's measure from 180 degrees.

Front

What is the relationship between exterior angles and interior angles in a triangle?

Back

An exterior angle of a triangle is equal to the sum of the two opposite interior angles.

Front

What are vertical angles?

Back

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

Front

If angle A is 44 degrees, what is the measure of its complement?

Back

The complement of angle A is 46 degrees (180 - 44 = 136 degrees).