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榔头和它的展开图
Author:
赵林
GeoGebra
New Resources
空间中两直线的位置关系
比較五件物件的重量
折扣
垂直線的斜率
直線的斜率：水平變化 & 鉛垂變化
Discover Resources
拿破崙三角形
有趣的反例
兩數相加
射线上滚动椭圆
乘法練習
Discover Topics
Differential Equation
Polynomial Functions
Distributions
Pie Chart or Circle Chart
Circle