Parallel and Perpendicular Lines

Front

The slopes of parallel lines are...

Back

the same

Front

These streets are: Parallel, Perpendicular, Intersecting

Back

Perpendicular

Front

Which figure shows a set of parallel lines?

Back

Figure 4

Front

What line is parallel to the x-axis?

Back

Line A

Front

What is the slope of Line F?

Back

m = undefined

Front

Definition of parallel lines

Back

Lines in a plane that never meet and are always the same distance apart.

Front

Definition of perpendicular lines

Back

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

Front

What is the slope of a horizontal line?

Back

m = 0

Front

What is the slope of a vertical line?

Back

m = undefined

Front

If two lines have slopes m1 and m2, when are they parallel?

Back

m1 = m2