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Author:黃斌

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直角坐標平面上的旋轉變換
四邉形 (四年級) 教師版
兩組對邊相等和有直角的四邊形
【案例】2018年全国1卷理科12题
判斷球體

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GeoGebra繪本
test area
CircleIII
自製工具：CurveFit, Bezier
S3 Ex4.3 Q04(3D圖)

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Sphere
Geometric Transformations
Curve Sketching
Sine
Parallelogram

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