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10 cards from this deck
Two circles that intersect at exactly one point
Point of contact
External touching and internal touching
On opposite sides of the tangent
Smaller circle inside the larger circle
Collinear (on a straight line)
∣C1C2∣=r1+r2|C_1C_2| = r_1 + r_2∣C1C2∣=r1+r2
∣C1C2∣=∣r1−r2∣|C_1C_2| = |r_1 - r_2|∣C1C2∣=∣r1−r2∣
Sum of the radii (r1+r2r_1 + r_2r1+r2)
Difference of the radii (∣r1−r2∣|r_1 - r_2|∣r1−r2∣)
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