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正n邊形
Author:
許清惟
GeoGebra
New Resources
科赫雪花
盈利與虧蝕
圓的切線方程
三角函数 的副本
第八周作业1
Discover Resources
用面積逼近圓周率
小二、小三_時間（學生版）
正五角錐
Quadratic Inequalites(ax^2+bx+c)
组合体的表面积1
Discover Topics
Confidence Interval
Kite
Straight Lines
Stochastic Process or Random Process
Bar Chart or Bar Graph