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# Geometry games and resources online

This is an annotated and hand-picked list of online tutorials, games, worksheets, and activities for geometry. It is a long list, but I have grouped the websites by the subtopics in geometry, so please see the following menu. Each topic has resources that fit many grade levels.

**Constructions**

**Geometric Construction**

An interactive lesson with explanations and quiz from Absorb Mathematics course written by Kadie Armstrong, a mathematician.

www.absorblearning.com/mathematics/demo/units/KCA006.html

**Animated Geometric Constructions**

Simple animations that show how to do basic geometric constructions.

www.mathsisfun.com/geometry/constructions.html

**Geometric Constructions Illustrated with Interactive Java Applets**

Interactive applets and instructions for doing the basic geometric constructions online.

www.personal.psu.edu/dpl14/java/geometry/

**RoboCompass**

An interactive online environment where you can draw using virtual compass, ruler, and protractor in a coordinate grid. Robocompass uses a total of 22 drawing commands, such as draw a point, draw a perpendicular line, find an angle, reflect an object, and so on.

www.robocompass.com

**GRACE - Graphical Ruler and Compass Editor**

An interactive online tool that allows dynamic creation and modification of ruler and compass constructions. Constructions may be built from one of five geometric primitives (Line, Line Segment, Ray, Circle, Perpendicular Bisector, and Intersection), and from other constructions; thus constructions may be built by composing more basic constructions.

www.cs.rice.edu/~jwarren/grace/

Math Mammoth Geometry Worksheets CollectionA 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! www.mathmammoth.com/worksheets/geometry.php |

**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.

AGmath.com/1973.html