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 · diameter. p. 240 circumference, p. 241 pi, p. 241 semicircle, p. 242 Ch k It out sson Tutorials 8igIdeasMath com A circle is the set of all points in a plane that are the same

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Pi ­ is the ratio between a circle'scircumference and its diameter

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Radius

DiameterChord

Sector

Arc (Length)

Parts of a Circle

a line which intersects  a circle exactly twice

* diameter isa special chord

portion ofthe circle'scircumference

portion ofcircle's area

Circle: the collection of points that areequidistant from a fixed point (center)

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