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圓錐截痕
Author:
洪宜慧
GeoGebra
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【案例】2013年安徽高考15题
球体的体积推导（优化版）
球体的体积推导
畫出對稱圖形
【案例】圆柱体内放置一个大球六个小球
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高線
幾何鋪磚 3, 4, 6 邊形
柱體高度與體積
三角恒等式證明
圓周_半圓內的半圓
Discover Topics
Natural Numbers
Division
Linear Regression
Difference and Slope
Pyramid