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Ex5C#6
Author:
Big Lee
GeoGebra
New Resources
兩組對邊相等的四邊形
第八周作业
兩位數除以一位數（二）
異分母分數減法
球體建築師
Discover Resources
Conic section
Activity 3
vertex
反射(鉛垂線、水平線及斜線) Reflection (vertical line, horizontal line and line)
用面積逼近圓周率的副本