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12 cards from this deck
Products of segments of each chord are equal
AP×PB=CP×PDAP \times PB = CP \times PDAP×PB=CP×PD
Similarity of triangles formed by intersecting chords
90°90°90° (right angle)
Diameter subtends semicircle, forms right triangle with radii
Supplementary
180°180°180°
Opposite arcs form full circle (360°360°360°)
Perpendicular at point of contact
Tangent touches circle at exactly one point
Angle between tangent & chord = angle in alternate segment
Angles subtended by chord in different segments are equal
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