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用交轨法求动点的轨迹方程图.许兴华数学
Author:
许兴华数学
Topic:
Conic Sections
GeoGebra
New Resources
第八周作业
找出對稱軸
三位數除以一位數（二）
球体的体积推导（优化版）
兩組對邊相等和有直角的四邊形
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平行線法
七角柱(可側轉、上下轉)
PA + PB
圓外角測試
圓柱圓錐
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Square
Parallelogram
Combinatorics
Mathematics
Cube