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七巧板（tangram）
Author:
孟宝兴
拖动每个形状，用对应的点选择对象。
GeoGebra
GGB学习交流群：217440999 作者：云南师范大学 孟宝兴 QQ：297770550 邮箱：mengbaoxing@163.com
New Resources
sanjiaohanshu
畫出對稱圖形
四邊形的特性
球體建築師
三位數除以一位數（二）
Discover Resources
Locus: Equidistance From Two Intersecting Lines
三次函數02
傅立葉
Net of cylinder
榔头和它的展开图
Discover Topics
Plane Figures or Shapes
Calculus
Ratios
Percentages
Logarithmic Functions