Planes

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Great (and short)Powerpoint Presentation on Points, Lines, and Planes.

A helpful scientific calculator that runs in your web browser window.

Introduction to plane geometry

Definition of the geometric plane

Explains the differences between parallel and perpendicular planes.

Gives a simple definition of plane gemometry then points to sub-topics and drawing tools to further explain the topic.

Explains how to form and identify planes in a very simple manner.

This page gives the definition and an easy-to-understand description of a 2-dimensional plane.