Parallel Lines and Transversals

Front

What are parallel lines?

Back

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

Tags

CCSS.HSG.CO.A.1

Front

What is a transversal?

Back

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

Front

What are supplementary angles?

Back

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

Tags

CCSS.7.G.B.5

Front

What are corresponding angles?

Back

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

Tags

CCSS.8.G.A.5

Front

What are alternate interior angles?

Back

Alternate interior angles are pairs of angles that are on opposite sides of the transversal and inside the two lines.

Tags

CCSS.8.G.A.5

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines cross. They are always equal.

Tags

CCSS.7.G.B.5

Front

How do you identify corresponding angles in a diagram?

Back

Look for angles that are in the same relative position at each intersection of the transversal with the parallel lines.

Tags

CCSS.8.G.A.5

Front

What is the relationship between alternate interior angles when the lines are parallel?

Back

When the lines are parallel, alternate interior angles are equal.

Tags

CCSS.8.G.A.5

Front

What is the relationship between supplementary angles formed by a transversal?

Back

When a transversal intersects two parallel lines, the pairs of angles on the same side of the transversal are supplementary.

Front

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

Back

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

Tags

CCSS.8.G.A.5