Engineering↗
Parallel and Perpendicular Lines
Equal slopes for parallel, negative reciprocals for perpendicular, why the second rule holds, and the vertical-horizontal exception.
Every page in the KEVOS library tagged parallel lines. 2 pages.
Equal slopes for parallel, negative reciprocals for perpendicular, why the second rule holds, and the vertical-horizontal exception.
Solve systems graphically by interpreting intersections, coincident lines, parallel lines and overlapping inequality regions.