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-3/2 ≤ cosα + cosβ + cosγ ≤ 3
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
前提:α + β + γ = 0
New Resources
四邊形的特性
GeoGebra笔记功能体验课件
柱體建築師
兩組對邊相等的四邊形
四邉形 (四年級) 教師版
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waaachen
三垂線
義守財數101級製作
複合棒形圖2
洋葱新手任务打卡
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Secant Line or Secant
Limits
Circumcircle or Circumscribed Circle
Addition
Rotation