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Synopsis
Excerpt from Key to Bradbury's Elementary Geometry and Trigonometry
All the divisors of 360, not less than 60, are 60, 72, 90, 120, 180, and 360; of which only 60, 90, and 120 can be the number of degrees in an angle of a regular polygon. These numbers represent the number of degrees in each angle of an equilateral triangle, a square, and an equilateral hexagon respectively.
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Key to Bradbury's Elementary Geometry and Trigonometry Classic Reprint
Seller: PBShop.store US, Wood Dale, IL, U.S.A.
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HRD. Condition: New. New Book. Shipped from UK. Established seller since 2000. Seller Inventory # LX-9780484197137
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Key to Bradbury's Elementary Geometry and Trigonometry Classic Reprint
Seller: PBShop.store UK, Fairford, GLOS, United Kingdom
Seller rating 5 out of 5 stars
HRD. Condition: New. New Book. Shipped from UK. Established seller since 2000. Seller Inventory # LX-9780484197137
Quantity: 15 available