FUKUCHAN – Resources – GeoGebra

Which is closer to you?
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FUKUCHAN
Sangaku
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Regular hexagon
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3 concentric circles and equilateral triangle.
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Malfatti squares
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Restore the triangle
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Isosceles triangle and two circles
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The proportion
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Concyclic
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Heptagram?
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Locus
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Pentagram
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Square and Equilateral triangle #2
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Square and inscribed equilateral triangle
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parallel
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Same length
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Equilateral triangle
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Right-angle isoceles triangle
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Sangaku --- extension
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Equilateral polygon and circles with same dia.
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Regular triangle
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Sangaku?
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How to find the focus of ellipse
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Sangaku?
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FUKUCHAN