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Geometry: Plane

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Videos are available in Windows Media Format. Please click on the link below to begin the video:

• View "Geometry: Plane" Video (Opens in a new window.)

Topics: Misconceptions, Formulas for Area

Objectives: Via peer-to-peer interaction and demonstration, this video will

• Define/describe the following terms: polygon, shape, plane figure, square, rectangle, triangle, non-right angle parallelogram, trapezoid, circle, area
• Address a major polygon misconception: squares are not rectangles (In fact, squares are special cases of rectangles.)
• Present area formula development for the following plane figures: square, rectangle, triangle, non-right angle parallelogram, trapezoid, circle

Resources

• Download the "Geometry: Plane " Video Transcript
• Download the Guidesheets that correspond to this video. (7 pages/Adobe Acrobat Document: 31 KB)
• If you have comments or suggestions, please fill out our Online Feedback form.
• Gavin, M. K., Belkin, L. P., Spinelli, A. M., & St. Marie, J. (2001). Navigating through geometry in grades 3-5. Reston , VA : National Council of Teachers of Mathematics.
• Improving Measurement and Geometry in Elementary Schools: http://images.rbs.org/

Online Quizzes

Test your knowledge! You will need Macromedia Flash Player to view this portion of the website.

1. Rectangle
2. Square
3. Non-right Angle Parallelogram
4. Triangle (Part A)
5. Triangle (Part B)
6. Trapezoid
7. Circle
8. Square