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3-9: Learning Goals

  • Let’s find the areas of shapes made up of circles.

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3-9-1: Still Irrigating the Field

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3-9-2: Comparing Areas Made of Circles

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3-9-2: Comparing Areas Made of Circles

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3-9-3: The Running Track Revisited

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3-9: Lesson Synthesis

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  • What is the area, in terms of π, of a circle with a radius of 10?
  • What is the area, in terms of π, of a circle with a diameter of 10?
  • What is the area, in terms of π, of a half-circle with a diameter of 10?

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3-9: Learning Targets

  • I can write exact answers in terms of π.
  • I can calculate the area of more complicated shapes that include fractions of circles.

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3-9-4: Area of an Arch

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