Challenges 11 - 20 . . .

No. 11, Square and Nonagon

No. 12, Square and Octagon

No. 13, Hexagon and Pentagon

No. 14, Hexagon and Rhomboid

No. 15, Parallelogram and Heptagon

No. 16, Square and Two Pentagons

No. 17, Two Squares and Hexagon

No. 18, Three Squares

No. 19, One Square, Diamond and    Hexagon

No. 20, One Square, Triangle,    Rhomboid and Pentagon

Working a puzzle for which you have no solution is tough . . . as well I know.  So here's a small hint to get you going.  This hexagon is *not* one of the prize-winning puzzles, but it could spark your interest in Hill's American Geometric Prize Puzzle.  Remember that all of the pieces came together to make this figure.  (And see No. 9 for an important clue ;)

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