Expressions, equations, and relationships
7.8(C)Finding Circle Formulas With Models
Use models to determine the approximate formulas for the circumference and area of a circle and connect the models to the actual formulas.
Part of The student applies mathematical process standards to develop geometric relationships with volume
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Intro
Circles: From Models to Formulas
By the end of this lesson you will use a string model and a cut-apart circle model to find approximate formulas for circumference and area. You will connect those models to the actual formulas C = πd, C = 2πr, and A = πr².
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