3.+Points,+Lines,+and+Planes

=Points, Lines, and Planes= Objective: To understand the basic terms and postulates of geometry.

Visit Standards page to identify numbers. NCTM Standards: 3, 7 CT Mathematics Standards: 1.2a(1), 3.1, 3.2
 * Standards **

You can think of a point as a location. A point has no size. A //geometric figure// is a set of all points. //Space// ﻿is defined as the set of all points. A //line// is a series of opints that extends in two opposite directions without end. Points that lie on the same line are //collinear points.// A //plane// is a flat surface that has no thickness. It contains many lines and extends without end. Points and lines that lie in the same plane are called //coplanar.//

Watch this podcast about //points, lines,// and //planes//: media type="youtube" key="GK3h7LzqsUg?fs=1" height="385" width="480"

Once you have watched the video, edit this wiki to name one example of each of the following:
 * < [[image:cube.gif width="252" height="267"]] || a point:

a line:

a plane:

a plane using another form of naming:

collinear points:

coplanar objects:

a plane that doesn't lay on one of sides of the cube: ||

Look at how coplanar lines are applied in technology: [] and then read []. Come up with your own real-world examples of points, lines, and planes, and put them under the discussion tab.

A //postulate// is an accepted statement of fact. Sometimes these are called //axioms.//

Define the following postulates from your book: Postulate 1-1

Postulate 1-2

Postulate 1-3

Postulate 1-4