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生活中的平面圖形關係─線對稱
Author:
Galen_1
GeoGebra
New Resources
兩位數除以一位數（一）
拼砌四邊形
小数 的副本
四邉形 (四年級) 教師版
找出對稱軸
Discover Resources
選擇合適的「中間人」
重心性質
vector stack pile
圖形的周界 3
Protractor-usage
Discover Topics
Random Experiments
Tree Diagrams
Secant Line or Secant
Vectors 2D (Two-Dimensional)
Logarithm