Geometry - 4th Edition

Chapter 9: Perimeter and Area

After viewing a link, close the browser window to return to this page.
Some links are repeated for use with more than one lesson.

Please report broken links to Kathy Kral

These sites apply to the entire chapter.

http://www.freemathhelp.com/Lessons/PreAlgebra_Perimeter_and_Area_BB.htm
This site contains a video tutorial with notes on perimeter and area.

http://staff.argyll.epsb.ca/jreed/math9/strand3/3108.htm
This page summarizes and illustrates the perimeter and area formulas of the basic geometric figures, along with a word search applets for vocabulary terms. (Requires Java.)

http://www.regentsprep.org/regents/math/algebra/AS1/indexAS1.htm
This page includes several links to discussion and practice of areas and perimeters for the polygons covered in this chapter.

9.1 Rectangles and Squares

http://www.syvum.com/cgi/online/serve.cgi/squizzes/geometry/square_rectangle_area_1.html
This page gives the formulas for finding perimeter and area of rectangles and squares.

http://www.cimt.plymouth.ac.uk/projects/mepres/book7/bk7i9/bk7_9i3.htm
This page explains and providers practice for finding the perimeter and area of rectangles and squares.

9.2 Parallelograms and Triangles

http://www.cut-the-knot.org/Curriculum/Geometry/AreaOfParallelogram.shtml
This site shows how to find the area of a parallelogram.

9.3 Trapezoids

http://staff.argyll.epsb.ca/jreed/math9/strand3/trapezoid_area_per.htm
This page interactively demonstrates the formulas for finding the perimeter and area of trapezoids.

http://www.algebralab.org/Word/Word.aspx?file=Geometry_AreaPerimeterTrapezoids.xml
This page contains practice problems on finding the perimeter and area of trapezoids.

9.4 Regular Polygons

http://www.algebralab.org/lessons/lesson.aspx?file=Geometry_AreaPerimeterRegularPolygons.xml
This site explains how to find the perimeter and area of regular polygons.

http://www.efunda.com/math/areas/RegularPolygonGen.cfm
This page discusses the perimeters and area of regular polygons.

9.5 Circles

http://math.about.com/od/formulas/ss/areaperimeter_5.htm
This page gives the formulas for finding perimeter and area of a circle.

http://www.analyzemath.com/Geometry_calculators/area_perimeter_circle.html
This page contains a calculator that finds the perimeter and area of a circle by stating the radius.

9.6 Areas of Similar Figures

http://www.explorelearning.com/index.cfm?method=cResource.dspDetail&ResourceID=189
This page contains a gizmo about perimeter and area of similar figures.

9.7 Geometric Probability

http://archive.p2pu.org/math-future/createshare-math-interactives/discussion/geometric-probability-links-spinners.html
This site includes links to several different spinners, and a tool to measure for the purpose of calculating geometric probabilities to compare with experimental results.

http://www.ics.uci.edu/~eppstein/junkyard/random.html
This site includes activities relating geometry, area, and probability.