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三角形的高與面積
Author:
+x sir
GeoGebra
New Resources
畫出對稱圖形
拼砌四邊形
【案例】2018年全国1卷理科12题
柱體建築師
兩位數除以一位數（一）
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圓周
數字組合
圓內兩半圓相切問題
圆在折线上滚动
蜗牛壳模型
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Dilation
Cube
Linear Regression
Parametric Curves
Constructions