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热带风暴storm
Author:
赵林
GeoGebra
New Resources
異分母分數減法
兩位數除以一位數（一）
畫出對稱圖形
【案例】圆柱体内放置一个大球六个小球
算柱 (兩位數)
Discover Resources
永遠垂直、以像素為單位的向量？
正九邊形
滾動圓周來發現圓周長
a Geogebra file created by the first pre-service teacher
橢圓內的光線反射 獻給聰哥
Discover Topics
Cosine
Percentages
Random Variables
Geometric Transformations
Difference and Slope