Distance between parallel lines (Parallel lines ax+by+c1=0 and ax+by+c2=0 separated by this distance.)
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Parallel lines ax+by+c1=0 and ax+by+c2=0 separated by this distance.
What each symbol means
| Symbol | What it stands for |
|---|---|
| a,b | Same coefficients on x,y |
| c1,c2 | Constants differing between the two lines |
When to use this
Same a,b on both lines (not just proportional typo).