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The plan here is to start with geometric figures and move to patterns and variables. Algebra and geometry are connected.
Important definition: Regular Polygon: A polygon is "regular" if all its sides are equal in length and all its interior angles are also equal to each other. |
1. Give everyone paper and pencil and ruler. Ask them to draw a regular triangle
2. Why does it get more difficult to draw the regular polygons as the number of sides increases? Answer: it’s harder to guess what the angle and the side length will be as the number of sides and angles increases. Students may not know what regular means. See the definition at the left. Internet Resources https://mste.illinois.edu/m2t2/algebra/regs.gsp is a Geometer's Sketchpad file of regular polygons. Resources for this unit are available at https://mste.illinois.edu/m2t2/algebra/ |