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This Java applet enables students to create tessellations, which are patterns on a plane that do not overlap. The student selects a hexagon, rectangle, or triangle to distort by dragging edges and the newly formed corners. Users can select colors for the pattern, and a button displays information in a second window. The window lists the coordinates of the vertices, angle measures, side lengths, area, and perimeter for the shape. From the applet page, What, How, and Why buttons open pages that explain the activity's purpose, function, and how the mathematics fits into the curriculum. A page also links to the NCTM geometry standard for grades 6-8. Supplemental resources include lesson plans and background mathematics information, as well as questions and explorations to answer such questions as why some shapes do not tessellate. Copyright 2005 Ohio State University
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