Topic 2: Parallel and Perpendicular Lines

Front

What are parallel lines?

Back

Two lines that never cross.

Front

What does perpendicular mean?

Back

Lines cross at 90 degrees.

Front

What are vertical angles?

Back

Angles that are opposite of each other when lines intersect.

Front

Name a line skew to FG.

Back

DC.

Front

Name a line skew to AD.

Back

CG.

Front

What are skew lines?

Back

Lines that do not intersect and are not parallel.

Front

What is the relationship between parallel lines and transversals?

Back

When a transversal crosses parallel lines, it creates corresponding angles that are equal.

Front

What are alternate interior angles?

Back

Angles that are on opposite sides of the transversal and inside the two lines.

Front

What are corresponding angles?

Back

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

Front

What is the sum of angles in a triangle?

Back

180 degrees.