This week we move from lines and angles to the application of geometry through area and perimeter. We will continue to visit angles, lines, and rays through our warm-ups and Pizzazz, but our work for the rest of this unit will be the kind of geometry we use in our "real" lives.
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AREA
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Today (Monday) I thought about fences and carpets and how they summarize what we need to think about when we think about perimeter (fences) or area (carpets). When I went to Menard's on Saturday with Mr. Carlson, we were looking at new carpet for our bedroom. We had to know how many square feet (actually square yards) we needed. It occurred to me that I use this skill all the time without really having to think about it. I'm hoping that the practice we have this week will begin to provide that kind of facility to seventh-graders.
Sometimes seventh-graders have learned the formulas for area and perimeter without really understanding what they are doing. We have been talking a LOT about what we are finding when we find area (the number of square units in something, even if that something is ROUND).
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PERIMETER
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This Week:
Monday: Review of area of triangles and parallelograms
Tuesday: Area of irregular polygons
Wednesday: Investigating surface area
Thursday: Practicing surface area and CFA 5.3
Friday: Area of a circle (Lab) and relearn/retest/review
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