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Autore:
吳政憲
GeoGebra
A1={polygon(A,B,C,D)} A2=Join(dilate(A1,1/3,A),dilate(A1,1/3,B),dilate(A1,1/3,C),dilate(A1,1/3,D),dilate(A1,1/3,(A+B)/2),dilate(A1,1/3,(B+C)/2),dilate(A1,1/3,(C+D)/2),dilate(A1,1/3,(D+A)/2))
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兩組對邊相等的四邊形
判斷球體
異分母分數減法
直角坐標平面上的旋轉變換
【案例】2018年全国1卷理科12题
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圓周角
平行四邊形的面積
規律物件集的製作
Tangent from an external point
集合间基本关系(wd)
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Parallelogrammi
Divisione
Rette tangenti
Statistica
Grafici di curve