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9 cards from this deck
Shortest distance measured along perpendicular line
d=∣ax1+by1+c∣a2+b2d = \frac{|ax_1 + by_1 + c|}{\sqrt{a^2 + b^2}}d=a2+b2∣ax1+by1+c∣
Coefficients from equation of the line
Coordinates of the given point
Ensures distance is non-negative
Normalises direction of the line
Shortest path between point and line
Point lies on the line
Negative reciprocal of original slope
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