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Watch Later 2:29

11.3.2-由一外點引出的兩條切線_chi

Watch Later 3:33

11.3.1-圓的切線的性質_chi

Watch Later 3:36

11.2-圓內接四邊形的檢測_chi

Watch Later 2:08

11.1.2-圓內接四邊形外角_chi

Watch Later 4:19

11.1.1-圓內接四邊形對角_chi

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10.4.2-Proportion Relations between Angles and Arcs_eng

Watch Later 3:20

10.4.1-Equal Relations among Angles, Arcs and Chords_eng

Watch Later 2:37

10.3.3-Angles in the Same Segment_eng

Watch Later 3:09

10.3.2-Angle in a Semi-circle_eng

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