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多出一块空间
Author:
陈宜红
Topic:
Constructions
,
Geometric Transformations
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
球体的体积推导（优化版）
三位數除以一位數（一）
錐體建築師
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國道計程收費
圓錐截痕
Quiz on Special Lines in Triangles 三角形內的特殊線：測驗
Euler line 2
p11-10
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Sphere
Functions
Coordinates
Orthocenter
Vectors