Parallel lines and transversals

Front

What is the definition of parallel lines?

Back

Parallel lines are lines in a plane that never meet; they 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 is the Angle Relationship for Alternate Exterior Angles?

Back

Alternate exterior angles are equal when two parallel lines are cut by a transversal.

Front

If m∠1 = 27°, what is m∠4 if lines are parallel?

Back

m∠4 = 27° (Alternate Interior Angles are equal).

Front

What is the relationship of vertical angles?

Back

Vertical angles are equal; they are formed when two lines intersect.

Front

What is the value of corresponding angles when two parallel lines are cut by a transversal?

Back

Corresponding angles are equal.

Front

What is the sum of the interior angles on the same side of a transversal?

Back

The sum of the interior angles on the same side of a transversal is 180°.

Front

How do you find the value of x in angle problems involving parallel lines?

Back

Use the properties of angles formed by transversals, such as alternate interior, corresponding, or same-side interior angles.

Front

What is the relationship between alternate interior angles?

Back

Alternate interior angles are equal when two parallel lines are cut by a transversal.

Front

What is the relationship between same-side exterior angles?

Back

Same-side exterior angles are supplementary; their sum is 180°.