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劉虹圻 內心
Author:
呂麗珠
GeoGebra
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三位數除以一位數（二）
小数 的副本
兩組對邊相等和有直角的四邊形
畫出對稱圖形
直角坐標平面上的旋轉變換
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前景背景
normal dist.
Angle between Line and Plane
GGB分解的按鈕設計
正三角形在长方形边上移动加滚动
Discover Topics
Cosine
Circle
Parallelogram
Area
Isosceles Triangles