Math‎ > ‎Geometry‎ > ‎

Circle

  • Length of circumference. C = 2πr = πd.
  • Area: πr2.
  • c is the center of the circle and r is the radius.
  • ||p - c || = r. p is a point on the circle.
  • Diameter D = 2r.
  • Circumference C = 2πr
  • Area A = πr2

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