圓的基本術語 | Basic Terms of Circles
影片內容：
01:26 – 圓的定義 | definition of circle
02:18 – 弧與扇形 | arcs and sectors
04:40 – 弦與弓形 | chords and segments
05:53 – 割線與切線 | secants and tangents
07:29 – 圓的類別 | different types of circles
01:26 – 圓的定義 | definition of circle
02:18 – 弧與扇形 | arcs and sectors
04:40 – 弦與弓形 | chords and segments
05:53 – 割線與切線 | secants and tangents
07:29 – 圓的類別 | different types of circles