Did you possibly mean hexagon?
Examples
“Half a dozen farm-estates formed a hectagon around it, but these belonged to ancient men who displayed themselves only as inert, gray-thatched lumps in the back of limousines on their way to the station, whither they were sometimes accompanied by equally ancient and doubly massive wives.”
Lists
These user-created lists contain the word ‘hectagon’.
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Marie of Roumania
discoveries from the writings of the magnificent Dorothy Parker
quaintsy-waintsy, a-dream, prevision, rouser, theatricalism, teagown, cup-custard, a-twist, boresome, heroic-sized, hectagon, wraithful and 3 more...
Tweets
Looking for tweets for hectagon.

qroqqa The maid appeared, bearing a triangular tray upon which was set an heroic-sized tea service of bright white china, each piece a hectagon.
—Dorothy Parker, 'Glory in the Daytime'
Presumably the intended meaning is a hexagon, influenced by 'hepta-' and 'hecto-'. Sep 14, 2008