Unit 3, Lesson 3: Exploring Circumference
Circle A has area 500 in2. The diameter of circle B is three times the diameter of circle A. Estimate the area of circle B. Solution. About 4,500 in2. If the diameter is 3 times greater, the area must be 32, or 9 times greater. Problem 4 (from Unit 3, Lesson 5) Lin’s bike … ................
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