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Apollonius Problem gergonne 3
Author:
tkyggb
GeoGebra
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直角坐標平面上的旋轉變換
判斷球體
兩組對邊相等和有直角的四邊形
算柱 (兩位數)
兩位數除以一位數（二）
Discover Resources
正弦定理的验证
三角形
密鋪2
四年級 最大公因數
分数应用题——巧分烧饼
Discover Topics
Rotation
Arithmetic Operations
Arithmetic Mean
Perimeter
Conditional Probability