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三角形三內角和
Author:
洪得祥
GeoGebra
New Resources
畫出對稱圖形
三位數除以一位數（一）
【案例】2013年安徽高考15题
異分母分數減法
【案例】2018年全国1卷理科12题
Discover Resources
Addition of 3 Directed Numbers
平面鏡成像 Image of Plane Mirror Reflection
分數(二)
多邊形與圓_2
兩位數除三位數(商<10)
Discover Topics
Arithmetic
Root
Fractal Geometry
Solids or 3D Shapes
Cosine