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Lesson Plan

Find the area of a circle by using the circumference

teaches Common Core State Standards CCSS.Math.Content.7.G.B.4 http://corestandards.org/Math/Content/7/G/B/4
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7
teaches Common Core State Standards CCSS.Math.Practice.MP8 http://corestandards.org/Math/Practice/MP8
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Big Ideas: The formula for the circumference of a circle is related to the formula for the area of a circle. If given the circumference and radius, we can be calculate the area and vice versa. This lesson builds on student understanding of circumference and area of a circle. Students are presented with a real world problem where they have to calculate the amount of glass needed for two options of window designs for a cruise ship. The task engages students in using the circumference of the circular windows to determine the amount of glass needed. Vocabulary: radius, diameter, area, circumference, pi Special Materials: None
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