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二次函數（第三階段）
Author:
yen
Topic:
Quadratic Functions
GeoGebra
New Resources
算柱 (兩位數)
找出對稱軸
四邉形 (四年級) 教師版
拼砌四邊形
兩位數加法
Discover Resources
找中點的坐標
橢圓動畫
四邊形的「等角分點」的副本
随机分支长度的二分树
开关灯游戏 5×3
Discover Topics
Logarithm
Cone
Hyperbola
Probability
Tangent Line or Tangent