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Author:
xiaoming wang
GeoGebra
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直角坐標平面上的旋轉變換
拼砌四邊形
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
兩組對邊相等的四邊形
Discover Resources
大邊對大角
三角形數
Möbius strip
示例2
[洋葱] 四边形与旋转变换
Discover Topics
Confidence Interval
Curve Sketching
Quadratic Functions
Normal Distribution
Geometric Distribution