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Published byGeorgiana Kelley Modified over 8 years ago

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Circles Today you will learn to: Compare and contrast the different parts of a circle. Determine the area and circumference of a circle. M07.C-G.2.2.1: Find the area and circumference of a circle. Solve problems involving area and circumference of a circle(s). Formulas will be provided.

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Circles Khan Academy Video

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Circles Khan Academy Video

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Circles: Examples

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In the example below, determine the circumference of the circle when given the diameter.

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Determining Diameter or Radius from Circumference Sometimes you may be asked to determine the diameter or radius of a circle when given the circumference. Simply use your formula for the circumference of a circle and work backwards to solve algebraically.

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Converting Between Circumference and Area Using the methods from the previous slide, you can determine the area of a circle from it’s circumference, and vice versa. This will take multiple steps, so be sure to be organized!

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