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  1. Book
    1. angle proportional to arc
    2. angles at circumference

    Book

    作者:topuztilbe
    Book

    内容目录

    • angle proportional to arc

      • Angle at Center
      • Angle at Center with spreadsheets
      • Arc and Angle
      • eyeball model
      • Spotlight
      • compare angles and arcs
      • two arcs
      • sliding secant lines
    • angles at circumference

      • Angle at circumference
      • angle at center and circumference
      • Equal angles in circle; various theorems
      • Analog Clock
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    Angle at Center

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