Crossword Puzzle Quadrilateral Crossword PuzzleOnline version Use google to complete the crossword puzzle by Tianny Sims 1 has two pairs of parallel lines 2 has 4 sides 3 means equal 4 only one pair of parallel sides 5 a line that connects opposite corners 6 two lines that will never cross 7 has 4 right angles and opposite sides are congruent 8 all sides are congruent 9 all sides are congruent and has 4 right angles 10 has two pairs of equal length sides that are adjacent to each other 2 3 4 1 7 10 6 8 5 9