Chapter 13: Circles and Cylinders

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  • Circles and cylinders
    • Circles
      • Circumference
        • 2?r
        • ?d
      • Area
        • ?r²
    • Sectors of circles
      • Area of sector
          • Where n is the angle of the sector
      • Arc length
        • n/360 2?R
          • Where theta is the angle of the sector
      • Semicircle
        • Perimeter
          • ? x r + 2 x r
        • Area
      • Quarter circle
        • Area
        • Perimeter
          • 1/2 x ? x r + 2 x r
    • Cylinders
      • Volume
        • ?r²h
          • volume = cross sectional area x height
      • Curved surface area
        • 2?rh
      • Surface area
        • 2?r² + 2?rh
        • 2 circles + curved surface area
        • 2?r(r+h)

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