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練習 - 反射對稱
Author:
Lau Sir
GeoGebra
New Resources
找出對稱軸
算柱 (兩位數)
拼砌四邊形
三位數除以一位數（二）
兩組對邊相等和有直角的四邊形
Discover Resources
Dividing in a Ratio 按比分物
階梯問題
垂直3
配方法圖解
Copy of 分割圓餅圖
Discover Topics
Rhombus
Incircle or Inscribed Circle
Matrices
Combinatorics
Congruence