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平行四邊形與三角形
Author:
李春培
Topic:
Area
平行四邊形與三角形
GeoGebra
New Resources
算柱 (兩位數)
兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
兩位數加法
畫出對稱圖形
Discover Resources
折線
三年級除法(三)：一位數除三位數
S3 Ex4.3 Q01(3D圖)
Choikou 5階
operation of matrix
翰林數學_2下_CH4-2_特殊平行四邊形有關對角線的性質
Discover Topics
Interest Calculation
Orthocenter
Rotation
Normal Distribution
Confidence Interval