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Sum of Exterior Angles of Polygons
Author:
pycchansir
GeoGebra
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sanjiaohanshu
【案例】2018年全国1卷理科12题
兩組對邊相等的四邊形
判斷球體
兩位數除以一位數（二）
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樞紐實驗
cycloid
project euler202（反射光线路线数）
圖形的周界
拋物線2-焦點法
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Congruence
Cone
Logarithm
Diagrams
Histogram