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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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4.4 ★★★★★
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Product Reviews
★★★★★ 5
Sturdy, heavy duty, great appearance.
Perfect desk drawer organizer for professional desk. I have 4 of these to help organize my drawers. Wood and metal is very classy. Feels heavy and durable. Perfect size for any drawer. I double them up.
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Reviewed in the United States on April 10, 2026
★★★★★ 5
Perfect midcentury organizer
After spending literally hours searching for a catchall/organizer, I finally decided to get this one for my husband. I'm so glad I did. His dresser is much more organized and clean, fits vitamin box, colognes, glasses, keys, and complements the midcentury look of our home. I ended up buying one for myself to store my perfumes and water bottles.
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Reviewed in the United States on December 15, 2025
★★★★★ 5
Great Desk Organizer Trays!
I don't often post reviews on Amazon but these desk organizer trays really deserve a review. These are LITERALLY knock off of Balolo trays at a fraction of the cost with the same quality and craftsmanship as Balolo. I got them with the hope of been able to take the divisions out and glad that I did. Taken the divisions out to use them as paper trays is possible and it is super easy to do with a screw driver taking 4 screws from under the tray. Then you can use them as paper trays. I got 5, three I'm using them as paper trays and 2 as desk organizers. The small tray and the pen holder are also worth getting to complete your desktop/office setup.
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Reviewed in the United States on July 27, 2025
★★★★★ 5
Good quality tray - didn't fit my desired use case but I'll still keep it
I bought this tray in place of one that costs more than double the price so the value is there. However, this tray does not fit within the upper tray of my desk shelf - it's probably about 1mm too thick to fit. Despite this, I've decided to keep the shelf because the quality indeed is good, and I just placed the tray under the other side of the desk shelf sitting on the desk instead. It keeps a number of my frequently used desk items organized.
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Reviewed in the United States on November 23, 2025
★★★★★ 5
Balolo Setup Cockpit Users: It's Worth a Look
If you own the Balolo Setup Cockpit and have the large tray, this will fit below the large tray with 4" to spare (left to right). It's too deep to fit in the tray; it will stick out the front by about 2 inches. On the desk (below the tray) it hangs about 1" past the tray, but you can't see it because it's in the back.
The walnut is a good match. Quality is decent. The felt is cheap, but I guess I can upgrade it on my own, or ignore it. My Balolo is magnetic so it's probably steel. But this product isn't magnetic, so it's probably aluminum.
Improvements: It's an obvious rip on the Balolo equipment and they should have done a better job on the sizing to make it more versatile. At 2.5" less deep, 1" less wide, and .25" less tall would allow it to fit in the tray and still allow one of their smaller drawers to fit next to it.
Verdict: It looks pretty good and is 1/5 the price of the Balolo drawer and has free shipping. I'm happy with it.
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Reviewed in the United States on April 5, 2025
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