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Author:
tan90
GeoGebra
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三位數除以一位數（二）
兩組對邊相等的四邊形
兩位數加法
画直线等分三角形的面积
【案例】圆柱体内放置一个大球六个小球
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固定三角形的條件−題1
Spherical Spiral
軌跡觀察---三同心圓上的三角形重心軌跡
B3C2-2例7-1
拋物線1--焦點法
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Terms
Intersection
Line Segment
Curve Sketching
Surface