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Testing slope
Author:
Peter Chan
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
找出對稱軸
球體建築師
画直线等分三角形的面积
Discover Resources
製作組織圖
翻轉方塊
Arbelos
三角
蜘蛛網製作
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Geometry
Mode
Scalene Triangles
Rhombus
Random Experiments