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S4E13镜面的方圆错觉
Author:
杨秀芬
GeoGebra
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异形操场
第八周作业2
比較五件物件的重量
平行線的判定
盈利與虧蝕
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廣義量角器
angle sum of triangle
Tangent perpendicular to radius
同旁內角---水平平行綫
謝爾冰司機-正方形
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Geometry
Mathematics
Optimization Problems
Statistics
Similar Triangles