Heptacontagon

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More things to try:

• heptacontagon
• annulus, inner radius=2, outer radius=5
• gcd x^4-9x^2-4x+12, x^3+5x^2+2x-8

Cite this as:

Weisstein, Eric W. "Heptacontagon." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Heptacontagon.html

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