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Coffee Brewing Control Chart
Author:
Chenwei Chen
GeoGebra
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兩組對邊相等的四邊形
兩位數除以一位數（一）
【案例】2013年安徽高考15题
【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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parallelogram
正三角形
數學傳播39卷4期, 平面幾何公式思考
-1 ≤ cosA cosB cosC ≤ 1/8
「相似三角形」任务4的副本
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Limits
Histogram
LCM and GCD
General Quadrilateral
Centroid or Barycenter