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Regular pentagon ABCDE is inscribed in a unit circle.  Compute AB*AC.

 Jul 12, 2021
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Regular pentagon ABCDE is inscribed in a unit circle.  Compute AB*AC.

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I find this very interesting:

 

If the length of a side of a regular pentagon is 1 unit, then the length of AC = 1.618033989 Golden ratio

 Jul 14, 2021

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