Pentagram: Difference between revisions
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See also
* [http://proofsfromthebook.com/2013/08/04/angle-sum-of-a-pentagram/ Angle sum of a pentagram]
=={{header|J}}==
Probably the simplest approach is:
<lang j>plot j./2 1 o./180p_1 %~ 72*i. 6</lang>
This will give a pentagram with a blue border and a white interior.
=={{header|Java}}==
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