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Angle Between Two Planes Definition 平面與平面間之交角 定義
Author:
Steven S. H. Chu
GeoGebra
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兩位數除以一位數（一）
兩組對邊相等的四邊形
画直线等分三角形的面积
算柱 (兩位數)
三位數除以一位數（二）
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角平分線製作
growth
量度長度(厘米)
Copy of 劉徽的「割圓術」
圆柱侧面的最短路径
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Expected Value
Addition
Percentages
Geometric Distribution
Boxplot