8.4 has a nice investigation where students break a regular polygon up into triangles, and find the area of each triangle, then multiply this area by the number of sides. Interesting how the number of triangles and the number of sides are the same, eh?
I started this by asking the students to try the Investigation as homework. It is my hope that some of them will notice the pattern on their own and better understand the formula. Only a few students seam to have made an attempt at the homework, but the people who have tried seamed to do well on it.
In class we looked at a regular polygon inscribed in a circle and looked at how as we add more sides to the polygon it is becoming more like a circle. I am trying to prepare students for tomorrow's area formula.
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I forgot to mention that I also covered the vocabulary term "Apothem" and reviewed how to find the perimeter of a regular n-gon.
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