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椭圆的简单作图：用中点弦
Author:
许兴华数学
Topic:
Ellipse
GeoGebra
New Resources
異分母分數減法
【案例】2018年全国1卷理科12题
球體建築師
球体的体积推导（优化版）
GeoGebra笔记功能体验课件
Discover Resources
Angle in Alternate Segment 3
[問題] G1, G2, G3 為△ACG, △ABG, △BCG 的重心
angle at centre vs angle at circumference
指對數函數交點分析
翰林數學_2下_CH3-1_三角形的內角與外角
Discover Topics
Scalene Triangles
Incircle or Inscribed Circle
Real Numbers
Conic Sections
Fractions