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12 cards from this deck
Angles inside a polygon
Angles formed when extending a side outward
180°180°180° (they form a straight line)
180°×(n−2)180° \times (n - 2)180°×(n−2)
360°360°360° (always)
All sides equal length, all angles equal size
360°n\frac{360°}{n}n360°
180°−exterior angle180° - \text{exterior angle}180°−exterior angle
72°72°72°
60°60°60°
45°45°45°
n=360°exterior anglen = \frac{360°}{\text{exterior angle}}n=exterior angle360°
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