Geometry - 4th Edition
Chapter 8: Polygons and Quadrilaterals
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8.1 Polygons
http://www.math.com/tables/geometry/polygons.htm
This site defines polygons, lists their names, and gives their formulas.
http://www.regentsprep.org/regents/math/geometry/GP9/LQuad.htm
NEW This page lists the quadrilaterals and their characteristics and includes pictures.
8.2 Angles of Polygons
http://www.algebralab.org/lessons/lesson.aspx?file=Geometry_AnglesSumPolygons.xml
This page explains the sum of the angles in polygons.
http://www.regentsprep.org/regents/math/geometry/GG3/indexGG3.htm
NEW This page has lessons and practice problems on the sums of interior and exterior angles of polygons.
8.3 Properties of Quadrilaterals
http://www.explorelearning.com/index.cfm?method=cResource.dspResourcesForCourse&CourseID=258
This site contains gizmos to explain quadrilaterals and other polygons.
http://www.math.com/school/subject3/lessons/S3U2L3GL.html
This site defines quadrilaterals and lists the five most common types.
http://www.answers.com/topic/quadrilateral
This page lists the quadrilaterals with pictures and explains their properties.
8.4 Properties of Parallelograms
http://www.coolmath.com/reference/parallelograms.html
This page explains the properties of parallelograms.
8.5 Special Parallelograms
http://www.freemathhelp.com/feliz-special-parallelograms.html
This page discusses special parallelograms.
http://www.cliffsnotes.com/WileyCDA/CliffsReviewTopic/Properties-of-Special-Parallelograms.topicArticleId-18851,articleId-18797.html
This site explains the properties of special parallelograms.
8.6 Properties of Trapezoids
http://www.coolmath.com/reference/trapezoids.html
This site explains the properties of trapezoids with pictures.
http://www.cliffsnotes.com/WileyCDA/CliffsReviewTopic/Properties-of-Trapezoids.topicArticleId-18851,articleId-18798.html
This page states the properties of trapezoids.
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