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希瓦定理
Author:
張丰耘
GeoGebra
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【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
判斷球體
三位數除以一位數（一）
算柱 (兩位數)
Discover Resources
normal vector
doto属性研究
Angle (Extended 2)
正立方體的截痕
HW question locus 3
Discover Topics
Congruence
Curve Sketching
Subtraction
Conditional Probability
Functions