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Author:
clh
,
Anthony OR 柯志明
GeoGebra
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兩位數加法
兩組對邊相等的四邊形
四邊形的特性
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
Discover Resources
四邊形 (2001 舊課程教師版)
volume
多次分割平行四邊形
內擺線觀察
Completing the Square (Part 6)
Discover Topics
Coordinates
Mathematics
Logarithmic Functions
Hyperbola
Functions