Parallel or Perpendicular

Front

What does it mean for two lines to be parallel?

Back

Two lines are parallel if they have the same slope and will never intersect.

Front

What does it mean for two lines to be perpendicular?

Back

Two lines are perpendicular if the product of their slopes is -1.

Front

If the slope of line A is m_A and the slope of line B is m_B, what condition must be met for the lines to be parallel?

Back

m_A = m_B.

Front

If the slope of line A is m_A and the slope of line B is m_B, what condition must be met for the lines to be perpendicular?

Back

m_A * m_B = -1.

Front

Given the slopes m_1 = 2 and m_2 = 2, are the lines parallel, perpendicular, or neither?

Back

Parallel.

Front

Given the slopes m_1 = 3 and m_2 = -rac{1}{3}, are the lines parallel, perpendicular, or neither?

Back

Perpendicular.

Front

Back

The slope is 4.

Front

Back

The slope is -rac{1}{2}.

Front

If two lines have slopes of -2 and -2, what can be said about their relationship?

Back

They are parallel.

Front

If one line has a slope of 1 and another has a slope of -1, what can be said about their relationship?

Back

They are perpendicular.