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S1E2 jastrow illusion
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学用数学
,
acchu
GeoGebra
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【案例】2018年全国1卷理科12题
畫出對稱圖形
兩組對邊相等和有直角的四邊形
球體建築師
兩位數加法
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经纬度
兩個多項函數的插值公式
string art
Lissajous curves(利薩如圖形)
学用数学（分季）
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Parabola
Special Points
Limits
Constructions
Dilation