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星球運動模擬
Author:
連琨銘
GeoGebra
New Resources
兩組對邊相等的四邊形
直角坐標平面上的旋轉變換
畫出對稱圖形
兩位數除以一位數（二）
錐體建築師
Discover Resources
史坦納圓鍊 (Steiner Chain)
testssss
硬幣
test
Area of a cricle by n-polygon
Discover Topics
Right Triangles
Straight Lines
Terms
Logic
Matrices