Chp 3 Flashcard Review

Front

What is a vertical angle?

Back

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

Front

What is the relationship between linear pairs of angles?

Back

Linear pairs of angles are two adjacent angles that form a straight line. They are supplementary, meaning their measures add up to 180 degrees.

Front

How can you determine if two lines are parallel using angles?

Back

Two lines are parallel if the corresponding angles are equal or if the alternate interior angles are equal.

Front

What is the definition of supplementary angles?

Back

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

Front

What is the definition of complementary angles?

Back

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

Front

What is the sum of the angles in a triangle?

Back

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

Front

What are corresponding angles?

Back

Corresponding angles are pairs of angles that are in similar positions on two parallel lines cut by a transversal. They are equal in measure.

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. They are equal in measure if the lines are parallel.

Front

What is a transversal?

Back

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

Front

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

Back

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