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錯角---不平行綫
Author:
chanfushun
GeoGebra
New Resources
錐體建築師
找出對稱軸
【案例】2018年全国1卷理科12题
判斷球體
兩位數除以一位數（一）
Discover Resources
圓底三角形截面
Conic Sections
平均線
诱导公式三（x轴对称关系）
Oscillations
Discover Topics
Random Experiments
Numbers
Inequalities
Curve Sketching
Pythagoras or Pythagorean Theorem