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Learn how an architect uses scale drawing and other mathematics to represent floor plans of buildings under construction in this video from MPT. In the accompanying classroom activity, students watch the video and then create a scale drawing of a rectangular area in or near the classroom, choosing an appropriate scale and explaining their strategies for calculating scaled measurements. In the process, they are exposed to an algebraic strategy for calculating dimensions to scale. To get the most from the lesson, students should have experience solving equations of the form ax = b. For a longer self-paced student tutorial using this media, see "Solving Linear Equations" on Thinkport from Maryland Public Television.