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S408 Penrose 階梯
Author:
学用数学
GeoGebra
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兩組對邊相等和有直角的四邊形
第八周作业
畫出對稱圖形
兩位數除以一位數（二）
判斷球體
Discover Resources
Plainmeter explained
圓錐曲線Conic
鏡射再旋轉
雙曲線3 等軸法
乘法練習
ckt-任意角
Discover Topics
Vectors 2D (Two-Dimensional)
Triangles
Root
Set Theory
Conic Sections