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黎曼和
Author:
chungYT
GeoGebra
New Resources
畫出對稱圖形
【案例】圆柱体内放置一个大球六个小球
兩組對邊相等的四邊形
三位數除以一位數（二）
判斷球體
Discover Resources
斜率 - 概念及定義 (2)
動圓的圓心軌跡為橢圓
畢氏定理動畫
指数函数定积分的动态演示.许兴华数学
烟囱
Discover Topics
Median Line
Linear Regression
Orthocenter
Percentages
Optimization Problems