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GeoGebra
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兩位數除以一位數（一）
兩組對邊相等的四邊形
【案例】2018年全国1卷理科12题
四邉形 (四年級) 教師版
畫出對稱圖形
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正立方體
Volume of the Cuboid
三角柱展開
gjh-g03-00 和的平方公式
圓切三半圓
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Volume
Sequences and Series
Logarithm
Secant Line or Secant
Circumcircle or Circumscribed Circle