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初犯九點圓
Author:
XIE Yuheng
Topic:
Geometry
九點圓
GeoGebra
New Resources
兩位數除以一位數（二）
四邊形的特性
兩組對邊相等和有直角的四邊形
柱體建築師
画直线等分三角形的面积
Discover Resources
color
Angle at Centre Twice Angle at Circumference
Multiplication of Polynomials(多項式的乘法)
三角形的构成的副本
抛物线中与三角形重心有关的轨迹.许兴华数学
Discover Topics
Parametric Curves
Tangent Line or Tangent
Inequalities
Division
Trigonometry