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多邊形周界A
Author:
Fung Kai NO.1 Primary School
GeoGebra
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【案例】2018年全国1卷理科12题
判斷球體
三位數除以一位數（二）
画直线等分三角形的面积
兩組對邊相等的四邊形
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九點共圓
分段移動
軌跡七︰移動點與一點一線保持相等距離(拋物線)
circle
-3/2 ≤ cosα + cosβ + cosγ ≤ 3
Discover Topics
Constructions
Histogram
Indefinite Integral
General Quadrilateral
Linear Equations