Parallel and Perpendicular Lines

Front

If two lines are parallel, their slopes are ____________

Back

the same.

Front

Choose the most precise answer: These roads are ____________

Back

Parallel

Front

Describe the figure: ____________

Back

parallel lines

Front

What is the slope of a line perpendicular to 5?

Back

-1/5

Front

The following represents slopes of two lines. Which answer choice describes the two lines? m = 7 and m = -7

Back

Neither

Front

Definition: Parallel Lines

Back

Lines in a plane that never meet and have the same slope.

Front

Definition: Perpendicular Lines

Back

Lines that intersect at a right angle (90 degrees).

Front

If the slope of one line is 2, what is the slope of a line perpendicular to it?

Back

-1/2

Front

What is the relationship between the slopes of two perpendicular lines?

Back

They are negative reciprocals of each other.

Front

Example: If line A has a slope of 3, what is the slope of a line parallel to it?

Back

3