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利用对称求线段和最值
Author:
梁航宇
GeoGebra
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【案例】2018年全国1卷理科12题
兩位數加法
拼砌四邊形
三位數除以一位數（一）
柱體建築師
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Quiz on True Bearings 真方位角：測驗
代入消去法
Angle at centre twice angle at circumference
謝爾賓斯基三角形
公因數
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Function Graph
Line Segment
Histogram
Rhombus
Similar Triangles