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繪製平行四邊形
Author:
均一
GeoGebra
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找出對稱軸
sanjiaohanshu
兩位數加法
【案例】2018年全国1卷理科12题
三位數除以一位數（二）
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風車2
分水問題
圆在多边形上滚动
遊戲
圓面積的應用
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Polygons
Numbers
Scalene Triangles
Kite
Linear Programming or Linear Optimization