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cover of geometry 4th edition textbook

Geometry - 4th Edition

Chapter 1: Discovering Geometry


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Some links are repeated for use with more than one lesson.

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1.1 Basic Geometric Figures

http://www.mathleague.com/index.php?option=com_content&view=article&id=75&Itemid=67
This site lists the basic geometric figures, defines them, and shows examples.

http://www.wisc-online.com/objects/index_tj.asp?objID=ABM301
This site explains the basic 2D figures and has a matching game at the end of the presentation.

1.2 Measuring Line Segments

http://www.freemathhelp.com/length-line-segment.html
This page explains how to find the length of a line segment by explaining examples.

1.3 Angles

http://www.mathleague.com/index.php?option=com_content&view=article&id=74&Itemid=67
This page explains angles and basic angle terms and includes pictures.

1.4 Constructions

http://www.cut-the-knot.org/do_you_know/compass.shtml
This site has instructions for constructions using only a compass.

http://www.regentsprep.org/regents/math/geometry/GC1/indexGC1.htm
This site contains lessons on basic constructions with practice problems.

1.5 Perpendicular and Parallel Lines.

http://www.mathsisfun.com/geometry/parallel-perpendicular-lines-planes.html
This page contains nicely illustrated definitions of perpendicular and parallel lines.