Study geometry concepts including perimeters, circumferences, areas, geometric notations, types of quadrilaterals and properties of polygons and polyhedra on the CoolMath website. The lessons are colorfully illustrated and include clear information about geometry from fundamental through trigonometry levels. In additions to lessons, CoolMath teaches students how to make tessellations and crop circles and how to generate fractal art. Geometric games, including virtual Spirograph-type games are also available on the site. Learn geometry concepts from one of the 10,000 geometry flashcard sets at Quizlet. Each flashcard set comes with interactive and printable worksheets, customizable quizzes and printed or virtual flashcards with audio.
Learn geometry by solving problems online for topics up to the eighth-grade level. Sixth-grade problems include the subjects of lines, angles, circles and volume and surface area. Seventh-grade IXL materials address three dimensional objects and perimeters, while the eighth-grade problems include topics such as the Pythagorean Theorem, congruent figures, similar solids and volume of cylinders, prism and cones. Advance through levels of geometry with these practice problems to reinforce concepts previously learned and to challenge new skills. Play a geometry version of Wheel of Fortune online at XPMath. Spin a wheel for virtual money prizes and solve with geometrical sayings and words.
Learn to measure angles with a virtual protractor and find online problems to solve at Kidport's website. The site presents an angle, asks players to drag the protractor over the angle to get the measurement, then answer a multiple choice question. Another virtual protractor game at MathPlayground prompts players to measure an angle highlighted in red by entering the angle's numbers into the game, rather than by multiple choice as in the Kidsport game, which makes it a bit harder. A virtual protractor can be rotated over and around the angle in the MathPlayground game to solve its dimensions.
Use spatial reasoning and geometrical modeling to play print-and-cut-out tangram and tessellation games provided by the National Security Agency's Academia website. These games allow players to analyze characteristics of two-dimensional geometric objects while applying mathematics to transformation patterns and behaviors, and are available for download as pdf files. Virtual versions of tangram and tessellation games are available at the National Library of Virtual Manipulatives, along with dozens of other geometry games spanning grade levels K through12. Play dominoes with shapes other than rectangles, geometry transformation games or Turtle Geometry, which allows players to make a maze for a turtle to walk based on geometric principles.