Parallel Lines and Transversal

Front

What are 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 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

How do you find the measure of an angle's supplement?

Back

The supplement of an angle is found by subtracting the angle's measure from 180 degrees.

Front

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

Back

When two parallel lines are cut by a transversal, alternate interior angles are equal.

Front

What is the relationship between same-side interior angles when two lines are parallel?

Back

When two parallel lines are cut by a transversal, same-side interior angles are supplementary.

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

If angle A and angle B are corresponding angles, what can be said about their measures?

Back

If angle A and angle B are corresponding angles and the lines are parallel, then angle A is equal to angle B.

Front

What is the formula to find the measure of an angle if it is expressed in terms of a variable?

Back

To find the measure of an angle expressed as a function of a variable, substitute the value of the variable into the expression.

Front

What is the definition of supplementary angles?

Back

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