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Properties of a Parallelogram
Author:
Lttcmooc
GeoGebra
New Resources
三位數除以一位數（一）
拼砌四邊形
判斷球體
第八周作业
兩組對邊相等的四邊形
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三角函數角度轉換
反射(鉛垂線、水平線及斜線) Reflection (vertical line, horizontal line and line)
基础知识
百度(改良版)
動態軌跡與動態色彩
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Polygons
Translation
Cube
Addition
Real Numbers