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将三角形面积一分为二
Author:
谢鹏
GeoGebra
New Resources
找出對稱軸
拼砌四邊形
異分母分數減法
兩位數除以一位數（一）
【案例】2018年全国1卷理科12题
Discover Resources
梯形中線
Estimating Mean 猜猜平均數
比較分數大小
All you need is
椭圆的参数方程的副本
Discover Topics
Constructions
Cosine
Circumcircle or Circumscribed Circle
Vectors
Tree Diagrams