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練習 - 逆時針旋轉（三角形）
Author:
Lau Sir
Topic:
Triangles
GeoGebra
New Resources
算柱 (兩位數)
四邉形 (四年級) 教師版
找出對稱軸
兩位數除以一位數（一）
【案例】2013年安徽高考15题
Discover Resources
最大斜率的直線
max{f(x),g(x),s(x)} 與 min{f(x),g(x),s(x)}
四邊形特性
Is it a condition for //gram?
等腰三角形
Discover Topics
Conditional Probability
Cone
Linear Regression
Trigonometry
Optimization Problems