How to use Algebra to find parallel and perpendicular lines. How do we know when two lines are parallel? Their slopes are the same!

Learn how to tell if two distinct lines are parallel, perpendicular, or neither. Use the slope formula to calculate the slope of each line to determine if they are parallel, perpendicular, or neither.

Demonstrates how to determine if slopes are for parallel lines, perpendicular lines, or neither. Explains why graphing is not generally helpful for this type of question.

Dec 1, 2025 · There are three ways that the two lines can interact: They are parallel and so they never intersect. They are perpendicular and so they intersect at a right angle. They intersect, but they are …

Mar 26, 2025 · Parallel lines are two or more lines that lie in the same plane but never intersect, no matter how far they are extended. The symbol ‖ is used to indicate parallel lines. In contrast, …

Sep 2, 2024 · Determine the slopes of parallel and perpendicular lines. Parallel lines are lines in the same plane that never intersect. Two nonvertical lines in the same plane, with slopes m 1 and m 2, …

Jun 14, 2022 · Parallel lines never intersect and always remain the same distance apart. They have identical slopes. Perpendicular lines intersect at a 90° angle. Their slopes are negative reciprocals of …

To find the slope, we’re really dividing the vertical displacement, that’s the change in 𝑦, by the horizontal displacement, or the change in 𝑥. As a recap of how this works in practice, let’s say that we have the …

Nov 7, 2024 · Learn how to identify parallel and perpendicular lines using slopes. Easy-to-follow examples with graphs included

In this lesson, the slope of a line segment connecting two points will be compared to the slope of segments parallel and perpendicular. A general formula for finding the slope of a perpendicular line …