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生活中的平面圖形─多邊形的性質
Author:
Galen_1
GeoGebra
New Resources
兩位數加法
拼砌四邊形
兩組對邊相等和有直角的四邊形
算柱 (兩位數)
四邉形 (四年級) 教師版
Discover Resources
three
特殊線.ggb
Locus: Fixed Distance From Line Segment
相似双子模型（任意三角形）
翰林數學_2下_CH3-1_三角形的外角和
Discover Topics
Pythagoras or Pythagorean Theorem
Sine
Circle
Kite
Geometric Transformations