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几何模版：线段关系练习
Author:
艳er
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
兩位數加法
四邊形的特性
兩位數除以一位數（二）
球體建築師
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跑馬燈
認識GeoGebra--相似三角形
很厲害喔
量詞
正四面體變菱形12面體
Discover Topics
Sine
Root
Poisson Distribution
Similar Triangles
Definite Integral