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Description
Practical Conic Sections: The Geometric Properties of Ellipses, Parabolas and HyperbolasIllustrated with interesting examples from everyday life, this text shows how to create ellipses, parabolas, and hyperbolas and presents fascinating historical background on their ancient origins. The text starts with a discussion of techniques for generating the conic curves, showing how to create accurate depictions of large or small conic curves and describing their reflective properties, from light in telescopes to sound in microphones and
Illustrated with interesting examples from everyday life, this text shows how to create ellipses, parabolas, and hyperbolas and presents fascinating historical background on their ancient origins. The text starts with a discussion of techniques for generating the conic curves, showing how to create accurate depictions of large or small conic curves and describing their reflective properties, from light in telescopes to sound in microphones and amplifiers. It further defines the role of curves in the construction of auditoriums, antennas, lamps, and numerous other design applications. Only a basic knowledge of plane geometry needed; suitable for undergraduate courses. 1993 edition. 98 figures.Binding Type: Paperback
Publisher: Dover Publications
Published: 10/18/2010
ISBN: 9780486428765
Pages: 112
Weight: 0.47lbs
Size: 9.02h x 6.56w x 0.32d
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★★★★★ 5
Belgian Malinois approved
Size: Large
This ball was the perfect choice for my 8 month old Belgian Malinois. Should last for years so far it has survived all her chewing needs. It’s the perfect size so I don’t have to worry about her swallowing it.
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Reviewed in the United States on February 11, 2026
★★★★★ 5
Good chew toy for an aggressive chewing dog
Size: Large
Well built for an aggressive chewing dog. I wouldn't say indescribable but it has lasted longer than all other chew toys he's had.
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Reviewed in the United States on April 26, 2026
★★★★★ 5
Kong is worth every dollar
Size: Large
Love Kong items. These balls last forever and my dog is happy!
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Reviewed in the United States on April 15, 2026
★★★★★ 5
Excellent choice for large breed aggressive chewers.
Size: Large
Best choice in play ball. My large breed dog hasn't been able to destroy it.
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Reviewed in the United States on May 26, 2026
★★★★★ 4
Ball is heavy due to solid construction
Size: Large
Just received the large ball. Construction appears to be excellent and time will tell with my aggressive chewer. That being said I ordered the large because our Mini Goldendoodle loves playing with our daughter’s dog large ball. I may not have read description close enough but ball is solid and weighs a considerable amount. Our dog soon learned to pick it up but I’m just disappointed that it isn’t hollow like ones our daughter has.
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Reviewed in the United States on January 6, 2026