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凹面镜及凸面镜成像
Author:
ng jun kai
,
Tom Walsh
Move the tip of the Object arrow or the point labeled focus. Move the arrow to the right side of the mirror to get a convex mirror.
GeoGebra
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Bisectors
Irrational numbers - pythagoras
types of triangle based an angles
Common Multiples: IM 6.7.17
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Incircle or Inscribed Circle
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