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補角關係
Author:
藍邦偉 Blue
GeoGebra
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【案例】2018年全国1卷理科12题
找出對稱軸
兩位數加法
畫出對稱圖形
三位數除以一位數（二）
Discover Resources
PMC 2014-15 ans
(008)80102
三角形等差數列比 共線
Inclined plane (Angle between two planes)
四邉形 (四年級) 教師版
Discover Topics
Incircle or Inscribed Circle
Right Triangles
Symmetry
Sequences and Series
Exponent