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托勒密定理推廣到任意四邊形二
Author:
連琨銘
GeoGebra
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球体的体积推导
兩位數加法
三位數除以一位數（二）
拼砌四邊形
三位數除以一位數（一）
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直线倾斜角与斜率
mathmedia_40204
三角形内切圆
locus
mooc第四讲作业单晨
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Constructions
Distributions
Function Graph
Combinatorics
Linear Regression