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Online resources for geometry: games, activities, worksheets, tutorials, and books

I have gathered many lists of online resources for geometry. The games and activities are grouped topics—please see the following menu.

This page itself contains a list of general geometry websites, worksheets, and books.

Shapes & polygons  
Area & perimeter  
Solids, volume, & surface area  
Coordinate plane  
Congruent transformations  
Similar figures  
Circle / Pi  
The Pythagorean Theorem  
General geometry websites  
Advanced topics  

General geometry websites

Geometry - Math Warehouse
Detailed lessons about angles, triangles, quadrilaterals, circles, similar triangles, parallelograms, polygons, and trapezoids.

Geometry course from Learning Math
This online geometry course includes readings, problems, videos, interactive activities, homework problems and solutions. It is meant for K-8 teachers but will work well for middle school students as well.

Absorb Mathematics
Absorb Mathematics is an excellent interactive course written by Kadie Armstrong, a mathematician. The lessons in it contain interactivity, explanations, and quiz questions. The course concentrates on geometry and trigonometry but includes a few other topics as well. While most of the content is accessible by a fee only, some lessons are available as free samples.

BBC Bitesize Shape and space
Short revision (review) "bites" with some activities and short tests for middle/high school level. Topics include shapes, angles, transformations, lines, polygons, symmetry, circles, Pythagorean Theorem, and constructions.

Geometry Homework Help from Math.com
Basic tutorials and quizzes on common geometry topics found in middle and high school.

Math Mammoth Geometry 1

A self-teaching worktext for 4th-5th grade that covers angles, triangles, quadrilaterals, cirlce, symmetry, perimeter, area, and volume. Lots of drawing exercises!

Download ($6.90). Also available as a printed copy.

=> Learn more and see the free samples!

See more topical Math Mammoth books

Geometry Reference Sheet
Both online and printable versions; includes area and volume formulas for common shapes plus Pythagorean Theorem.

Geometry Tutorials
Simple tutorials on triangles and their properties, polygons, symmetry, angles and much more. Also includes lots of solved geometry questions and some interactive applets.

Dynamic Geometry® Explorations
A bunch of interactive geometry activities, along with instructions and questions to guide your exploration. Need a Java-enabled browser.

National Library of Virtual Manipulatives for Interactive Mathematics: Geometry
Collection of interactive geometry activities: Congruent triangles, fractals, geoboard activities, Golden rectangle, Ladybug leaf, Ladybug mazes, platonic solids, tangrams, tessellations, transformations and more.

Great Pyramid
Clear instructions on how to make a scale model of the Great Pyramid at Giza out of paper.

Math Mammoth Geometry 2

A self-teaching worktext for 6th-7th grade that covers the area of triangles, parallelograms, and polygons, pi, area of circle, nets, surface area, and volume of common solids.

Download ($5.70). Also available as a printed copy.

=> Learn more and see the free samples!

See more topical Math Mammoth books


Math Mammoth Geometry Worksheets Collection
A collection of quality worksheets with variable problems for grades 3-8. Topics include angle relationships, triangles, quadrilaterals, congruency, similar figures, constructions, area, volume, and the Pythagorean Theorem. Price: $9.00 download. See the free samples!
Math Mammoth Geometry Worksheets Collection

Geometry worksheets & quizzes
Worksheets about complementary and supplementary angles, parallel, perpendicular, and intersecting lines, types of angles, basic shapes, area & perimeter of rectangles, and parts of a circle.
www.dadsworksheets.com/v1/Worksheets/Basic Geometry.html

Geometry worksheets & quizzes
A bunch of PDF worksheets on geometry topics for elementary level, plus online quizzes.

Maisonet Math
Worksheets and online quizzes on a variety of geometry (and other) topics. Look for the links in the left sidebar for Angles, Area, Circumference, Geometry, Transformations, and Volume.

Math Mammoth Geometry Worksheets Collection
A collection of quality worksheets with varying exercises and word problems for grades 3-8. Price: $9.00 download.

MathKinz - Geometry
A few free geometry worksheets, most are for grades 2-5.

High School Measurement Worksheets and Geometry Worksheets
From FunMaths.com website, written by teachers from all over the world.
www.funmaths.com/worksheets/math_measurement_06.htm and

Let's Practice Geometry - Free Worksheets
Lots of free worksheets for high school geometry, including topics such as the Pythagorean Theorem, perimeter, area, volume, angle relationships, triangle theorems, similarity and congruence, logic, proofs, trig, polygons, and circles.

Geometry worksheets at AGMath.com
Hundreds of free PDF worksheets for high school geometry topics, including geometric constructions, triangle congruence, circle, area, the Pythagorean Theorem, solid geometry, and similarity. The worksheets are loosely based on the "Discovering Geometry" textbook by Michael Serra. Compiled by math teacher Jason Batterson.



Math Mammoth Geometry 1
A textbook/workbook together for grades 3-5, written by the owner of this site. You will learn geometry by drawing. Topics covered include angles, rectangles, parallelograms, polygons, circles, area, perimeter, and volume. Price: $7.00 download, $12.70 printed.

Math Mammoth Geometry 2
A textbook/workbook together for grades 6-7, written by the owner of this site. It continues the study of geometry after Math Mammoth Geometry 1, continually emphasizing conceptual understanding, besides calculation-type exercises. Price: $5.80 download.

Geometry: A Guided Inquiry
An excellent choice for high school geometry. I've written an in-depth review of this book and of its supplement Home Study Companion - Geometry, latter by David Chandler.

Harold Jacobs Geometry
A popular choice for a geometry textbook among homeschoolers, and well written. Please read my review.

Kiselev's Geometry / Book I. Planimetry
A famous Russian geometry book translated. Acclaimed for the clarity of exposition which makes the book accessible for 7th graders.

A High School First Course in Euclidean Plane Geometry
This is a high school geometry course by Charles Aboughantous. It is based on Euclid's five postulates and his most common theorems. It promotes the art and the skills of developing logical proofs. Practice problems are included at the end of each chapter in three groups: geometric construction problems, computational problems, and theorematical problems. The answers to the computational problems are included at the end of the book. The solutions manual of the book contains detailed solutions to all the problems in the book. It is free to home schooled students upon proof of purchase of the book. Samples are found at http://home.earthlink.net/~draboughantous/geometry.html

Kiselev's Geometry / Book I. Planimetry
A famous Russian geometry book translated. Acclaimed for the clarity of exposition which makes the book accessible for 7th graders.

Dr. Math Presents More Geometry
An inexpensive companion to any high school geometry course with excellent explanations. Read my review.

Advanced topics

Go Geometry
All things geometry: geometry theorems, huge list of geometry problems, presented with visual diagrams, geometric art, puzzles, dynamic geometry, and more.

Why is High School Geometry so Difficult  A HomeschoolMath.net article
And what to do about it. In this article, I investigate the reasons and remedies for why so many students find their high school geometry course to be difficult.

Tim's Triangular Page
Lists all the basic facts about triangles followed by some problems.

How to Write a Solution
An article exploring aspects of how to write a clear solution - or proof. Meant for college students but helpful for anyone who wants to learn to write mathematical proofs.

Euclid's Elements
A set of Java applets that bring to life the theorems in Euclid's Elements.

Interactive Java software for creating ruler and compass constructions in both the Poincaré disk and the upper half-plane models of hyperbolic geometry. See also, Why is it Important for Students to Study Hyperbolic Geometry?

Free math worksheets and practice - Adapted Mind

Practice makes perfect. Practice math at IXL.com

Free math worksheets and practice - Adapted Mind