Parallel, Perpendicular, or Neither?

Front

What are parallel lines?

Back

Parallel lines are lines in a plane that never meet. They have the same slope but different y-intercepts.

Tags

CCSS.HSG.CO.A.1

Front

What are perpendicular lines?

Back

Perpendicular lines are lines that intersect at a right angle (90 degrees). The slopes of perpendicular lines are negative reciprocals of each other.

Tags

CCSS.4.G.A.1

CCSS.HSG.CO.A.1

Front

What does it mean if two lines are neither parallel nor perpendicular?

Back

If two lines are neither parallel nor perpendicular, they intersect at an angle that is not 90 degrees and have different slopes.

Tags

CCSS.4.G.A.1

CCSS.HSG.CO.A.1

Front

How can you determine if two lines are parallel from their equations?

Back

Front

How can you determine if two lines are perpendicular from their equations?

Back

Front

Back

The slope of the line is 3.

Tags

CCSS.8.EE.B.5

Front

Back

The slope of the line is -3.

Tags

CCSS.8.EE.B.5

Front

Back

Neither, because their slopes (3 and -3) are not equal and do not satisfy the condition for perpendicularity.

Front

Back

The slope of the line is -4.

Tags

CCSS.8.EE.B.5

Front

Back

Parallel, because they have the same slope of -4.

Tags

CCSS.8.EE.B.6