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诱导公式四（原点对称关系）
Author:
桃篮翁
GeoGebra
New Resources
【案例】2018年全国1卷理科12题
畫出對稱圖形
第八周作业
兩組對邊相等的四邊形
兩位數除以一位數（一）
Discover Resources
Area of Triangle_2
正方形和等邊三角形轉化_李樂雯
三角柱展開圖
glt-c02-00 長方體
畢氏定理
Discover Topics
Subtraction
Intersection
Differential Equation
Quadratic Equations
Surface