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tessellation design
Author:
Hsin Han Wang
GeoGebra
New Resources
拼砌四邊形
四邉形 (四年級) 教師版
【案例】圆柱体内放置一个大球六个小球
第八周作业
球体的体积推导
Discover Resources
两平面夹角1
拋物線5--包絡線法
C60足球模型展开（双色版）
老師講解6
斜率乘积为定值（椭圆、双曲线）
Discover Topics
Pythagoras or Pythagorean Theorem
Normal Distribution
Standard Deviation
Cube
Hypergeometric Distribution