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三節棍
Author:
chen mingchuan
GeoGebra
New Resources
兩位數除以一位數（二）
三位數除以一位數（二）
四邉形 (四年級) 教師版
【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
Discover Resources
echen say
複變數函數
Locus (Parallel lines)
填色問題(封閉圖形)
DANDELIN
Discover Topics
Addition
Similar Triangles
Geometric Transformations
Vectors 2D (Two-Dimensional)
Kite