Perpendicular Slope Calculator
Original Slope (m)
Perpendicular slope = −1/m. Product of perpendicular slopes = −1.
Two lines are perpendicular if they meet at right angles (90°). The slope of a line perpendicular to a line with slope m is −1/m. This is used in geometry, navigation, and engineering.
- 1If slope of line 1 is m, perpendicular slope = −1/m
- 2Product of perpendicular slopes = −1
- 3Horizontal line (m=0) ⊥ vertical line (undefined slope)
- 4Two non-vertical lines are perpendicular iff m₁ × m₂ = −1
m = 2=Perpendicular slope = −½
m = −3/4=Perpendicular slope = 4/3
| Original Slope m | Perpendicular −1/m |
|---|---|
| 1 | −1 |
| 2 | −0.5 |
| 3 | −0.333 |
| −2 | 0.5 |
| 0.5 | −2 |
| −0.25 | 4 |
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