8
See also
Eight Curve,
Eight Lemma,
Eight-Point Circle Theorem,
Eight Surface,
Figure
Eight,
Figure Eight Knot,
Lemniscate,
Octagon,
Octahedron,
Tesseract
References
Wells, D. The Penguin Dictionary of Curious and Interesting Numbers. Middlesex, England:
Penguin Books, pp. 71-73, 1986.