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10 cards from this deck
A line that just touches the circle but does not cut it
Line at right angles to a tangent
Perpendicular
One point (the point of tangency)
x1x+y1y=r2x_1 x + y_1 y = r^2x1x+y1y=r2
rrr
Two tangents, equal in length
Negative reciprocal
Zero (Delta=0Delta = 0Delta=0, one solution)
Equal in length
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