SKU: 5058362383

Regular Polytopes

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Description

Regular PolytopesPolytopes are geometrical figures bounded by portions of lines, planes, or hyperplanes. In plane (two dimensional) geometry, they are known as polygons and comprise such figures as triangles, squares, pentagons, etc. In solid (three dimensional) geometry they are known as polyhedra and include such figures as tetrahedra (a type of pyramid), cubes, icosahedra, and many more; the possibilities, in fact, are infinite H. S. M. Coxeter's book is the

Polytopes are geometrical figures bounded by portions of lines, planes, or hyperplanes. In plane (two dimensional) geometry, they are known as polygons and comprise such figures as triangles, squares, pentagons, etc. In solid (three dimensional) geometry they are known as polyhedra and include such figures as tetrahedra (a type of pyramid), cubes, icosahedra, and many more; the possibilities, in fact, are infinite H. S. M. Coxeter's book is the foremost book available on regular polyhedra, incorporating not only the ancient Greek work on the subject, but also the vast amount of information that has been accumulated on them since, especially in the last hundred years. The author, professor of Mathematics, University of Toronto, has contributed much valuable work himself on polytopes and is a well-known authority on them.
Professor Coxeter begins with the fundamental concepts of plane and solid geometry and then moves on to multi-dimensionality. Among the many subjects covered are Euler's formula, rotation groups, star-polyhedra, truncation, forms, vectors, coordinates, kaleidoscopes, Petrie polygons, sections and projections, and star-polytopes. Each chapter ends with a historical summary showing when and how the information contained therein was discovered. Numerous figures and examples and the author's lucid explanations also help to make the text readily comprehensible. Although the study of polytopes does have some practical applications to mineralogy, architecture, linear programming, and other areas, most people enjoy contemplating these figures simply because their symmetrical shapes have an aesthetic appeal. But whatever the reasons, anyone with an elementary knowledge of geometry and trigonometry will find this one of the best source books available on this fascinating study.

Binding Type: Paperback
Publisher: Dover Publications
Published: 06/01/1973
ISBN: 9780486614809
Pages: 368
Weight: 0.85lbs
Size: 8.47h x 5.41w x 0.68d
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SKU: 5058362383

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Chantelle Bechtel
New York, US
★★★★★ 5
Definitely recommend for large breed heavy chewing dogs
Size: Large 10", Style: Rubber Dog Toy
Great for a large breed dog. I got the 10inch for my large breed dog. Best choice ever.
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Reviewed in the United States on May 26, 2026
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Rockingrammie
Fort Morgan, US
★★★★★ 4
Nice big tire toy
Size: Large 10", Style: Rubber Dog Toy
Our dog has had a tire toy about the same size as this one for 2 years, but it's finally been worn down from his love and zest for it along with weather. When I saw this one, I got excited! Great size for our 80lb 3yo pittie and pretty tough too, although, it's beginning to show signs of wear in only 3 weeks of him playing with it. It's not nearly as rugged as his old rubber tire. We'll have to see how long it actually lasts before I say the price was worth it or not.
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Reviewed in the United States on October 8, 2023
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Isaac Erwin
Lowell, US
★★★★★ 5
Great dog toy for large breeds!
Size: Large 10", Style: Rubber Dog Toy, Size: Large 10", Style: Rubber Dog Toy
My dog Judge is a 110-pound German Shepherd that loves this tire! It is not the traditional ball that dogs like to play with, but it is so much safer since larger breeds might choke on a ball, as it’s easier to swallow! Judge doesn't go anywhere without his tire! From an owner's standpoint, it’s great also since it’s easy to throw and roll as well as last longer than most toys since it’s made of thick rubber! Best toy for the money I have found by far! Judge has the size large 10”!
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Reviewed in the United States on February 26, 2026
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Karen J Carter
Grantham, US
★★★★★ 3
Durable toy
Size: Medium 8", Style: Rubber Dog Toy
This is way too big for my dog. I thought it would be smaller when I ordered it.
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Reviewed in the United States on February 22, 2026
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Amazon Customer
Belleville, US
★★★★★ 5
my dog loves
Size: Medium 8", Style: Rubber Dog Toy
my dog is obsessed and it’s one of the only toys she can’t immediately tear apart, she’s on her second one
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Reviewed in the United States on April 24, 2026

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