Solving Equations Involving Parallel and Perpendicular Lines

The previous methods work nicely except for a vertical line: In this case the gradient is undefined (as we cannot divide by 0): m = yA − yBxA − xB = 4 − 12 − 2 = 30= undefined So just rely on the fact that: 1. a vertical line is parallel to another vertical line. 2. a vertical line is perpendicular to a horizontal line (and vice versa). See more
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Parallel and Perpendicular Lines

*Click on Open button to open and print to worksheet. 1. Equation of Parallel or Perpendicular Lines 2. Solving Equations Involving Parallel and Perpendicular 3. Infinite Algebra 1 4.

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