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Author:
陳允杰
GeoGebra
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兩組對邊相等的四邊形
四邊形的特性
錐體建築師
三位數除以一位數（一）
【案例】2018年全国1卷理科12题
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Primary School Geo
testing
max{f(x),g(x),s(x)} 與 min{f(x),g(x),s(x)}
從 12 面體、20 面體到 C60 C80
分數
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Symmetry
Planes
Linear Equations
Right Triangles
Sequences and Series