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定积分的概念
Author:
梁航宇
GeoGebra
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兩組對邊相等的四邊形
画直线等分三角形的面积
兩組對邊相等和有直角的四邊形
三位數除以一位數（一）
球體建築師
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等周長的扇形與矩形
y=a(x-h)²+k
橢圓軌跡03
ttttt
y=sinx对称中心
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Special Points
Ratios
Stochastic Process or Random Process
Mathematics
Circle