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P6 圓周
Author:
lkkbmaths teachers
GeoGebra
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三位數除以一位數（一）
兩組對邊相等和有直角的四邊形
兩位數加法
GeoGebra笔记功能体验课件
拼砌四邊形
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三角形外角和為360度
lim sin(x)/x = 1
angle sum of polygon
題4
七年级数学平行线间的橡皮筋问题
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Hyperbola
Cone
Dilation
Optimization Problems
Symmetry