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正n邊形內接縮小正n邊形
Author:
許清惟
GeoGebra
New Resources
小数 的副本
兩組對邊相等的四邊形
算柱 (兩位數)
兩位數除以一位數（一）
sanjiaohanshu
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正n多邊形面積逼近圓面積
會動的數據*3
找中點軌跡
多邊形周界B
橢圓3--平行四邊形法
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Circle
Arithmetic
Translation
Histogram
Statistical Characteristics