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（六）认识图形
Author:
玖数
GeoGebra
New Resources
錐體建築師
【案例】圆柱体内放置一个大球六个小球
兩位數加法
球體建築師
球体的体积推导
Discover Resources
繪畫三角形的外接圓
反射定律 Law of Reflection
Apollonius Problem kissing coin problem
抛物线的副本
图中的三角形面积何时最小？（许兴华数学）
Discover Topics
Pythagoras or Pythagorean Theorem
Sphere
Random Experiments
Terms
Square