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楕圆第一类定义与准线
Author:
WLS
GeoGebra
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活动三：应用性质
盈利與虧蝕
常见四边形是否是双心四边形
百分數及其應用
龙形曲线-分形龙
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正六面體摺疊
包絡橢圓
空間坐標
面積4
二重積分 (Double Integral)的副本
Discover Topics
Line Segment
Expected Value
Frequency Distribution
Mathematics
Similar Triangles