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How many lines are required to construct the Mystic Rose?

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A Mystic Rose consists of twenty points evenly spaced around a circle and every point is joined to every other point.

How many lines are required to construct the Mystic Rose?

posted Feb 11, 2015 by anonymous

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2 Answers

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  1. 1st points needs 19 lines. 2nd point needs 18 lines (it already has one), 3rd 17, etc
answer Mar 16, 2015 by Jcm
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Answer: 190

It should be 20C2 i.e. 20*19/2 or 190

answer Mar 16, 2015 by Salil Agrawal

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