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# The Australian 50 cent coin has the shape of a regular dodecagon, which is a polygon with 12 sides.Eight of these 50 cent coins will fit exactly on an Australian $10 note as shown. What fraction of th

The Australian 50 cent coin has the shape of a regular dodecagon, which is a polygon with 12 sides.Eight of these 50 cent coins will fit exactly on an Australian $10 note as shown. What fraction of the $10 note is not covered?