f. Parallel & Perpendicular Lines
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C1-11 [Coordinate Geometry: Parallel and Perpendicular Lines]
C1-11 [Coordinate Geometry: Parallel and Perpendicular Lines]
C1-12 [Coordinate Geometry: Finding the Negative Reciprocal]
C1-12 [Coordinate Geometry: Finding the Negative Reciprocal]
C1-13 [Coordinate Geometry: Find a Parallel & Perpendicular Line]
C1-13 [Coordinate Geometry: Find a Parallel & Perpendicular Line]