Geometry: Parallel and Perpendicular Lines

Know and use slope criteria for parallel and perpendicular lines, and find equations of parallel and perpendicular lines. Geometry for grade10, based on Common Core standard G-G...

A line has slope m. What slope does a perpendicular line have?

m -m 1/m -1/m
Which equation represents a line that is perpendicular to the line ? = 2? + 7?

? = -1/2? + 4 ? = 1/2? + 4 ? = -2? + 4 ? = 2? + 4
Which statement is true about the lines –8? + 6? = 24 and –3? + 4? = 9?

The lines are parallel. The lines intersect at a right angle. The lines intersect at an angle that is not 90°. The two equations represent the same line.
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