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Description
Coordinate GeometryA thorough, complete, and unified introduction, this volume affords exceptional insights into coordinate geometry. It makes extensive use of determinants, but no previous knowledge is assumed; they are introduced from the beginning as a natural tool for coordinate geometry. Invariants of conic sections and quadric surfaces receive full treatments. Algebraic equations on the first degree in two and three unknowns are carefully reviewed and carried
A thorough, complete, and unified introduction, this volume affords exceptional insights into coordinate geometry. It makes extensive use of determinants, but no previous knowledge is assumed; they are introduced from the beginning as a natural tool for coordinate geometry. Invariants of conic sections and quadric surfaces receive full treatments. Algebraic equations on the first degree in two and three unknowns are carefully reviewed and carried farther than is usual in algebra courses. Throughout the book, results are formulated precisely, with clearly stated theorems. More than 500 helpful exercises throughout the text incorporate -- often in rather novel settings -- each idea after its full and careful explanation. 1939 edition.Binding Type: Paperback
Publisher: Dover Publications
Published: 03/04/2005
ISBN: 9780486442617
Pages: 298
Weight: 0.85lbs
Size: 8.40h x 5.50w x 0.80d
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★★★★★ 5
My Dog’s New Favorite Toy!
My pup is absolutely obsessed with this bottle-shaped dog toy—it’s the perfect mix of fun and durability! It crinkles, without the lid obnoxious noise. Highly recommend for any dog!
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Reviewed in the United States on August 16, 2025
★★★★★ 5
A perfect addition to my dog’s toy collection
Cute dog toy that is a fun toy to add to my dog’s collection especially since we live near wine country. Jameson also loves that there’s a squeaker, and started playing with it right away.
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Reviewed in the United States on August 19, 2025
★★★★★ 5
Muy bonitos
Buen regalo para mis perros
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Reviewed in the United States on April 3, 2026
★★★★★ 3
Quite small.
These were way smaller than I imagined based on the photos. Those were obviously ai generated photos that don’t even look like the product at times. They are pretty flimsy and I wouldn’t buy again. My dog will tear this apart in 2 min. But it’s a good size to throw around I guess or maybe for a much smaller dog that doesn’t also want to chew.
3 stars because we will get some play out of them and there’s 2. Just know what you are getting
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Reviewed in the United States on October 16, 2025
★★★★★ 5
Very cute! My dog loves it!
You cannot beat the price of this donut dog toy and it includes two of them! I opened these up and my dog wanted to play with it right away. They are smallish, probably about the size of a regular donut. It might look a little small compared to my dog but he is 125lbs. These little donuts even have squeakers in them.
Is your dog going to be able to rip these apart… yes. I never expected him to not be able to rip these up. My dog first likes to give it nib nibs and then he will eventually rip it up. You will not find a better dog toy for the price that these are selling for on Amazon.
Plus it is adorable seeing your dog walking around with a donut in his mouth!
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Reviewed in the United States on October 12, 2025