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Description
Challenging Problems in GeometryDesigned for high school students and teachers with an interest in mathematical problem solving, this volume offers a wealth of nonroutine problems in geometry that stimulate students to explore unfamiliar or little known aspects of mathematics. Included are nearly 200 problems dealing with congruence and parallelism, the Pythagorean theorem, circles, area relationships, Ptolemy and the cyclic quadrilateral, collinearity and concurrency, and many
Designed for high school students and teachers with an interest in mathematical problem-solving, this volume offers a wealth of nonroutine problems in geometry that stimulate students to explore unfamiliar or little-known aspects of mathematics.Included are nearly 200 problems dealing with congruence and parallelism, the Pythagorean theorem, circles, area relationships, Ptolemy and the cyclic quadrilateral, collinearity and concurrency, and many other subjects. Within each topic, the problems are arranged in approximate order of difficulty. Detailed solutions (as well as hints) are provided for all problems, and specific answers for most.Invaluable as a supplement to a basic geometry textbook, this volume offers both further explorations on specific topics and practice in developing problem-solving techniques.Binding Type: Paperback
Publisher: Dover Publications
Published: 05/21/1996
ISBN: 9780486691541
Pages: 272
Weight: 0.58lbs
Size: 8.47h x 5.43w x 0.54d
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Product Reviews
★★★★★ 5
Dog loves them
Size: 6 Inch, Color: Independence Day
My dog loved the first ball I got her, so I got her a second one. Both hhavr been very durable (she likes to puncture things with her teeth). I left each ball slightly deflated, so they were still firm, but she could bite them without issues. She has not punctured either ball yet. I did have to watch her because she started trying to chew the tabs off because she was bored. She has not chewed one off, just started thinking about it, and did a tiny bit of damage to one tab.
She loves these balls. We have played tug of wat with them too, so yhe tabs are sturdy, and so is the ball.
The dog did not care what collar she got, so I grabbed the least expensive one, and the 6 inch. She is a medium sized dog with razor teeth, and these work great.
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Reviewed in the United States on March 15, 2026
★★★★★ 4
Not recommended for the aggressive player..
Size: 6 Inch, Color: Red, Size: 6 Inch, Color: Red
First this ball was not delivered when it should have been. Second, the tabs are poorly made. One day of my dog playing with it and the tabs are already torn up. The ball itself is fun for her and has not deflated for now at least.
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Reviewed in the United States on May 10, 2026
★★★★★ 5
Tough little toy for super chewers.
Size: Shoes
Great my two Yorkies. Bought two. So far, still in one piece.
UPDATE: This toy does not stand up to being washed. Since it is a "material" and not rubber, I would advise against buying it if you wash your dog toys. Sorry I bought several.
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Reviewed in the United States on December 1, 2025
★★★★★ 1
Not a durable toy.
Size: Drop Ball, Size: Drop Ball
I was very disappointed in this rope toys. It took one day for my Border Collie to destroy it. The rope is not a durable material at all. I had a rope toy that was like this one several years ago, but it was much more durable. It lasted a couple of years. I think this one would be great for a small puppy, but not for an adult dog. Very disappointing!
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Reviewed in the United States on April 19, 2026
★★★★★ 5
Fabulous play!
Size: Drop Ball
It is small for my 1 yr old girl boxer... my bad for not reading the product size details. The tug rope is great, but my rough boxer loved it too much and couldn't be trusted with it after much play. This toy opened the door for my purchasing tougher rope pull toys from the same brand.
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Reviewed in the United States on March 16, 2026