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GeoGebra
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找出對稱軸
畫出對稱圖形
三位數除以一位數(一)
拼砌四邊形
直角坐標平面上的旋轉變換
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waaachen
fhft
Epicycloid
Fractal
拋物線3--平行四邊形法
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Kite
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Parallelogram