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FUKUCHAN

  • Which is closer to you?

    Activity

    FUKUCHAN

  • Sangaku

    Activity

    FUKUCHAN

  • Regular hexagon

    Activity

    FUKUCHAN

  • 3 concentric circles and equilateral triangle.

    Activity

    FUKUCHAN

  • Malfatti squares

    Activity

    FUKUCHAN

  • Restore the triangle

    Activity

    FUKUCHAN

  • Isosceles triangle and two circles

    Activity

    FUKUCHAN

  • The proportion

    Activity

    FUKUCHAN

  • Concyclic

    Activity

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  • Heptagram?

    Activity

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  • Locus

    Activity

    FUKUCHAN

  • Pentagram

    Activity

    FUKUCHAN

  • Square and Equilateral triangle #2

    Activity

    FUKUCHAN

  • Square and inscribed equilateral triangle

    Activity

    FUKUCHAN

  • parallel

    Activity

    FUKUCHAN

  • Same length

    Activity

    FUKUCHAN

  • Equilateral triangle

    Activity

    FUKUCHAN

  • Right-angle isoceles triangle

    Activity

    FUKUCHAN

  • Sangaku --- extension

    Activity

    FUKUCHAN

  • Equilateral polygon and circles with same dia.

    Activity

    FUKUCHAN

  • Regular triangle

    Activity

    FUKUCHAN

  • Sangaku?

    Activity

    FUKUCHAN

  • How to find the focus of ellipse

    Activity

    FUKUCHAN

  • Sangaku?

    Activity

    FUKUCHAN