Parallel and Perpendicular Lines

Front

Slopes of perpendicular lines are...

Back

opposite reciprocals.

Front

What slope is parallel to: m = 3/4?

Back

3/4

Front

Parallel lines have __________ slopes.

Back

Equal

Front

If a line has a slope of -5/6, a line that is parallel has a slope of what?

Back

-5/6

Front

If a line has a slope of 4/7, a line that is perpendicular has a slope of what?

Back

-7/4

Front

Definition of parallel lines in geometry.

Back

Lines that never intersect and have the same slope.

Front

Definition of perpendicular lines in geometry.

Back

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

Front

What is the slope of a line that is perpendicular to a line with a slope of 2?

Back

-1/2

Front

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

Back

When m1 = m2.

Front

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

Back

When m1 * m2 = -1.