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方格纸上画平行线和垂线
Author:
郭勇
GeoGebra
New Resources
異分母分數減法
兩位數加法
四邊形的特性
拼砌四邊形
三位數除以一位數（一）
Discover Resources
好玩的輪盤
題二
製作對稱圖_教師示範
時鐘
圓周_半圓內的半圓
Discover Topics
Standard Deviation
Congruence
Parallelogram
Similarity Transformation or Similarity
Volume