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Author:
chen mingchuan
GeoGebra
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GeoGebra笔记功能体验课件
算柱 (兩位數)
【案例】2018年全国1卷理科12题
球体的体积推导（优化版）
三位數除以一位數（二）
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畢氏定理動態證明(歐基里得，應用時間參數跳躍函數)
證明三角形內角和180度
三角形三內角和
Parabola_Horizontal
拋物線--平行四邊形法
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Random Variables
Vectors 3D (Three-Dimensional)
Quadratic Equations
Secant Line or Secant
Similar Triangles