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Copy of 銳角三角：sin, cos
Author:
Gideon Huang
,
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
【案例】2018年全国1卷理科12题
兩位數加法
兩組對邊相等的四邊形
判斷球體
球体的体积推导（优化版）
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繪製一次函數圖形
Quiz on Solving One-step Linear Equations (1) | 解「一步」一次方程：測驗(1)
線對稱圖形
四面体棱锥外接球
两角差的正弦公式证明2
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Constructions
Tangent Line or Tangent
Diagrams
General Quadrilateral
Integral Calculus