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10 cards from this deck
Path traced by point on circle rolling along straight line
Roulettes
12 equal parts
One-twelfth of circumference
Diameter of circle (ddd)
Circumference of circle (2pir2pi r2pir)
Same level as base line
When Point P is at top of rolling circle
Smooth, symmetrical, no sharp corners
Perpendiculars from circle divisions
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