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Geometry

01

Visualizing Shapes and Transformations in 2D and 3D

  • How and why to include Computer-Aided Design (CAD) in your geometry middle school units or high school courses. Visit Making Math's Engineering pages for powerful 2-D and 3-D learning. 

02

Reasoning and Logic

  • Mouse Mazes - A game of inference

  • Zoe's Zoo - A game of problem solving with logic

    • Teacher Guide  pdf doc

    • Click to play online. Click for html version.

  • Euler diagrams

  • The Gnu Project

  • Direct proof

  • Proof by contradition

  • Proof by induction

03

Dynamic Geometry - Constructions and Discoveries

  • Where was that Earthquake?

  • Always-and-All quadrilaterals

04

Coordinate Geometry - Have more tools in your toolkit

  • Distance formula, midpoint formula, and slope

  • Using fewer variables - efficient set-ups

05

Quadrilaterals and Original Student Proofs

  • Basic properties of quadrilaterals

  • Modified quadrilaterals

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