Parallel lines cut by a Transversal

Front

What are parallel lines?

Back

Parallel lines are lines in a plane that never meet and are always the same distance apart.

Front

What is a transversal?

Back

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

Front

What are corresponding angles?

Back

Corresponding angles are pairs of angles that are in similar positions at each intersection where a transversal crosses two lines.

Front

What is the relationship between alternate interior angles?

Back

Alternate interior angles are equal when a transversal crosses parallel lines.

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect, and they are always equal.

Front

If angle 6 is 25 degrees, what is angle 7 if they are supplementary?

Back

Angle 7 is 155 degrees because supplementary angles add up to 180 degrees.

Front

What is the relationship of alternate exterior angles?

Back

Alternate exterior angles are equal when a transversal crosses parallel lines.

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

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.