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This activity is designed to engage the student in an exploration of the area of shapes formed by adjacent squares on a grid. After the student selects a perimeter, the Java applet generates a closed figure with that perimeter. The student enters the area of the figure, and the answer is checked automatically. The applet limits figures to rectangles and generates two column comparisons of areas and perimeters for multiple figures. From the activity page, What, How, and Why buttons open pages that explain the activity's purpose, function, and how the mathematics fits into the curriculum. Supplemental resources include lesson plans, background information about units of measure, handouts, and exploration questions for investigating the relationship between area and perimeter. Copyright 2005 Eisenhower National Clearinghouse
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