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重心
Author:
王廷祐
GeoGebra
New Resources
錐體建築師
【案例】圆柱体内放置一个大球六个小球
球体的体积推导
兩組對邊相等的四邊形
球体的体积推导（优化版）
Discover Resources
Thm8.1
等距共軛點(isotomic conjugate point)
Opp angles cyclic quad
变化的三角形的垂心.许兴华数学
圆柱侧面的最短路径
Discover Topics
Addition
Definite Integral
Triangles
Histogram
Logarithmic Functions