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Description
GeometryGeometry Designed for Understanding Jacobs Geometry utilizes a clear, conversational, engaging approach to teach your student the concepts, principles, and application of Geometry through practical, real life application! Harold Jacobs guides your student through Geometry, enabling them to discover the concepts & their applications for themselves in order to develop an understanding of the principles that goes beyond simple memorization to pass a
Geometry Designed for Understanding
Jacobs’ Geometry utilizes a clear, conversational, engaging approach to teach your student the concepts, principles, and application of Geometry through practical, real-life application! Harold Jacobs guides your student through Geometry, enabling them to discover the concepts & their applications for themselves in order to develop an understanding of the principles that goes beyond simple memorization to pass a test.
Jacobs’ unique instructional approach to math means your student:
- Develops a true understanding of geometric principles
- Interacts with concepts using real-world examples, ensuring they’ll know exactly how to apply the material they are learning to real-life and other academic subjects
- Is prepared to take their understanding of Geometry concepts outside the math textbook and successfully apply them to higher math courses, sciences, & everyday life
- Is equipped with an understanding of the foundational mathematical concepts of Geometry—and once a student truly understands the concepts in Geometry, they are equipped & prepared for all higher math & sciences!
Engaging, Real-World Instruction
Understanding both the why and how of Geometry is foundational to your student’s success in high school and college. Jacobs’ Geometry provides students with a clear and thorough understanding of why concepts work, as well as how they are applied to solve real-world problems.
A Top Choice for High School Success & College Prep
Jacobs’ Geometry has proven its ability to guide students towards success and is still the choice of top teachers and schools. The unique instructional method within Jacobs’ Geometry ensures your student understands both the why and how of Geometry and establishes a strong foundation for higher math & science courses. If your student is planning for college or a STEM career, Jacobs’ Geometry ensures they are equipped with the tools they need to succeed!
Geometry Student Text Includes:
- Full Color Illustrations
- 16 sections, covering deductive reasoning, lines & angles, congruence, inequalities, quadrilaterals, area, triangles, circles, theorems, polygons, geometric solids, and more!
- Answers to select exercises in the back of the text
- Flexible based on focus & intensity of course
- Set I exercises review ideas & concepts from previous lessons to provide ongoing application of material.
- Set II exercises allow student to apply material from the new lesson
- Set III exercises provided additional, more challenging problems
Table of Contents
- Forewords
- A Letter to the Student
- Acknowledgments
- Introduction: Euclid, the Surfer, and the Spotter
- Inductive Reasoning
- 1. An Introduction to Geometry
- 2. The Nature of Deductive Reasoning
- 3. Lines and Angles
- 4. Congruence
- 5. Inequalities
- 6. Parallel Lines
- 7. Quadrilaterals
- 8. Transformations
- Midterm Review
- 9. Area
- 10. Similarity
- 11. The Right Triangle
- 12. Circles
- 13. The Concurrence Theorems
- 14. Regular Polygons and the Circle
- 15. Non-Euclidean Geometries
- 16. Inequalities
- Final Review
- Glossary
- Formulary
- Postulates and Theorems
- Answers to Selected Exercises
- Illustration Credits
- Index
Endorsements
“This is one of the great geometry books of all time!”
Donald J. Albers, The Mathematical Association of America
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4.1 ★★★★★
Based on 22 reviews
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Product Reviews
★★★★★ 4
Better than the basic power strip
Color: White, Size: 2.5', Style: 2.5 ft
I needed to get a basic five or six outlet power strip and instead ended up with this
. Since the power strip that I was going to get was for basic protection, and would be plugged into a surge suppressor anyway, I really wasn't concerned about how much protection it offered. Just having the extra outlets for additional small-to-medium electrical devices was important.
While looking and comparing this with basic power strips, I decided to check the manufacturer's site to see what specs they offered, since the ones here seemed to be a bit inadequate. Here's what I found:
* 555 Joule energy rating provides maximum protection of all your sensitive electronic devices
* 6 Surge-protected outlets supply 2-line AC protection
* 2.5-foot power cord delivers optimal, safe AC power through a 14-gauge heavy-duty cord
* Filters EMI/RFI noise up to 43 dB reduction
* Maximum Spike Amperage of 36,000 Amps
* Lifetime Product Warranty
* $15,000 Connected Equipment Warranty
The pros on this unit include the price, the basic surge protection, a short but sturdy power cord, and good basic construction. It has a power/reset switch that's recessed at the top of the unit near the power cord to prevent accidental shutting down. On the negative side, like so many of these units, the outlets are too close together to put more than a couple transformer-type devices like cell phone chargers and such.
Just a couple of comments on the specifications listed above to those who may be interested: if you're going to plug high-end expensive electronics into one of these, don't do it. This is an adequate but very basic unit, and you want to consider getting a better grade surge suppressor for large screen televisions, good computer systems and such. No surge protector is 100% effective, but sure that the product is listed as a transient voltage surge suppressor, and that it meets the criteria for UL 1449, the absolute minimum performance standard for surge suppressors. I'm no electrical engineer or electronics technician, but if you're going to protect an expensive jogging machine, your new 52-inch television or Apple iMac 27-inch desktop system, you need better than an under $10 surge suppressor or power strip.
A friend who I will refer to as the 'cranky electronic tech' told me to look it up on the 'Net, but make sure that whatever I got for protection of "really good stuff" needed to be minimally have a UL1449 3rd Edition certification and be rated at 1400 joules of surge protection or higher, and the rest would fall into place. The
that I've used for years with my large electronics is rated at 3330 Joules, and meets those specs.
If you plan to use a basic surge suppressor to charge cell phones and the like with their transformer plugs, units with right-angle outlets are a better, though more costly choice. My personal choice for mid-range protection combined with outstanding quality is the
, a 5-star product that I own and have reviewed here. I run two notebook computers with this, along with a few chargers. There are others if you look.
If all that you're looking for is a basic surge protector with a reasonable amount of surge suppression, then this one from Belkin is a decent choice, and certainly better than the basic power strip. I actually came back recently and bought a second one this year. But if your needs call for more, then the above listed alternates may be worth a look.
4/25/2012
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Reviewed in the United States on April 26, 2012
★★★★★ 5
It just works, and that is all that matters
Color: White, Size: 10 ft (Pack of 1), Style: 10 ft
It's a Belkin product. Do you really need to know anything more? My roommate bought a really crappy multi-outlet, it worked for the low wattage stuff, but for the higher wattage stuff the internal breaker kept popping. I bought this one, and it hasn't failed me yet.
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Reviewed in the United States on February 4, 2026
★★★★★ 5
price, features, 5 star
Color: White, Size: 4 ft (Pack of 1), Style: 4 ft
i cant comment on its performance as a surge protector but as a power strip its awesome.
its redic cheap
plenty of plug ins
super thin, my other strip is twice as thick
the on off switch is hidden which is great to not accidentally hit it, and with having kids around
the cord length is perfect for my needs. its plug in behind a chair and a half and comes around the side and has plenty of play to move and plug and unplug
the only con i can say about it which is not really a con because it wasnt designed for it. your only going to fit 1 big adapter on the end, or your going to have to give up plug ins to have more than that. but that clearly isnt the design of this strip. its about being thin, compact, hidden, and cheap.
you want one that can do everything, your going to have to spend more
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Reviewed in the United States on March 7, 2013
★★★★★ 5
Works well
Color: Black, Size: 4 ft (Pack of 1), Style: 4 ft
Works well as expected
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Reviewed in the United States on February 10, 2026
★★★★★ 5
Everything You Expect, Nothing You Don't
Color: White, Size: 2.5', Style: 2.5 ft
The power strip got here quickly and works as advertised. I needed another strip because I had an extension cord setup for game systems that was NOT toddler-safe. Now I've got the plugs all tucked away at the back of the cabinet and away from little hands with no protruding prongs.
Also, power strips are a good way to save on your electric bill. Things like game systems that really don't need power when you're not using them will draw what's sometimes called "vampire load." It can really add up on your electric bill if you have a lot of things plugged in that aren't in constant use. If you run them through a strip and switch the strip off when you're not using them, you can save a few bucks on electricity. If you're a dad like me, a lower electric bill makes you wanna hang it up on the fridge and tell everyone what a good job you did and how proud they should be of you. There are WAY more fun things to do with a few spare dollars than spend them on running power to appliances you're not even using.
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Reviewed in the United States on May 10, 2012