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橢圓1-同心圓法
Author:
15黃瀚霆
GeoGebra
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算柱 (兩位數)
錐體建築師
三位數除以一位數（二）
兩組對邊相等的四邊形
【案例】2013年安徽高考15题
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橢圓軌跡加滑桿
Geometric Meaning of Derivatives
圓錐
Slope(斜率公式)
正立方體切三刀
Discover Topics
Percentages
Cosine
Cone
Equilateral Triangles
Similar Triangles