Question: How do you color a curved convex shape?

Color_letterD.mws

The attached program shows a convex shape viz the letter D made of an implicit curve and a straight upright line.  I'd like to color the interior.  I was thinking of trying to make a polygon from the points of the curve - but I don't know how to access them.  If I could access them I could put the coordinates in a list L:=[[x1,y1],[x2,y2]...[xn,yn]]  and then just use plots( polygon(L).).

Any suggestions appreciated.   ...and please keep it simple - I'm only using Maple 7.

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