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Learn about the role of math in architecture in this media gallery from MPT. In the accompanying classroom activity, students design a triangular roof and find equations for the lines that include the sides of the triangle. They verify that the point at which the two lines intersect satisfy both equations. To get the most from the lesson, students should be comfortable finding the equation of a line from two points and graphing linear equations, and they should be familiar with slope and y-intercept. For a longer self-paced student tutorial using this media, see "Systems of Equations" on Thinkport from Maryland Public Television.