立體圖形的術語 | Terminology in 3-D Figures

影片內容:

01:16 – 投影 | projection
04:25 – 線與平面的交角 | angle between a line and a plane
05:49 – 兩個平面的交角 | angle between two planes
10:35 – 最大斜率的直線 | line of greatest slope

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