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欧拉线与三角形中心
Author:
宋晓燕
GeoGebra
New Resources
判斷球體
【案例】2018年全国1卷理科12题
畫出對稱圖形
兩組對邊相等和有直角的四邊形
四邊形的特性
Discover Resources
分段移動
正弦與正切值的大小關係
projection02 by Mr LO WY
三角形重心的变化.许兴华数学
斜率乘积为定值（椭圆、双曲线）
Discover Topics
Interest Calculation
Differential Calculus
Square
Piecewise Functions
Linear Regression