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練習 - 逆時針旋轉（三角形）
Author:
Lau Sir
Topic:
Triangles
GeoGebra
New Resources
画直线等分三角形的面积
四邊形的特性
第八周作业
三位數除以一位數（一）
【案例】2013年安徽高考15题
Discover Resources
斯坦納-雷米歐司(Steiner-Lehmus)定理證明一
不規則圖形的周界(雙L)
活動工作紙LEVEL03
P1 1st Maths
Copy of Fill a special area
Discover Topics
Stochastic Process or Random Process
Random Experiments
Histogram
Differential Calculus
Random Variables