載入中... 相關課程 Back 【例題3】30-60-90的直角三角形的邊長比 登入觀看 ⇐ Use this menu to view and help create subtitles for this video in many different languages. You'll probably want to hide YouTube's captions if using these subtitles. 【例題3】30-60-90的直角三角形的邊長比 上傳學習單 下載學習單