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November 30th, 2015, 12:35 PM   #1
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pentagon

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November 30th, 2015, 01:19 PM   #2
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Found it! x is in between lines CD and FD, above point M.
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December 2nd, 2015, 06:26 AM   #3
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We rotate triangle DGA about D by 36° and obtain triangle DHB, therefore x = 180° - 36° = 144°.
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Last edited by skipjack; December 2nd, 2015 at 07:09 AM.
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