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Course Guide - USAID Teacher Education Project

Course Guide - USAID Teacher Education Project

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Once again students will derive formulas for the surface area of cuboids and cylindersafter measuring and calculating the surface area of various boxes and cans. Studentsshould come up with several different formulas to express the surface area ofcuboids. This is an opportunity to discuss how the various formulas are equivalent.It is also important that students realize that every 3-dimensional object in our worldhas surface area. That means not only other geometric figures such as pyramids,spheres, and dodecahedrons but also tables, cooking pots, and mangoes. To illustratethis point, ask students to consider how many separate areas they would cover if theywere painting an entire table (the top, 4 sides, the table's underneath, plus its 4 legs).

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