opposite sides congruent
diagonals bisected
opp sides same slope. Consecutive sides not perpendicular.
diagonals perpendicular but not congruent.
perpendicular sides (not all 4 congruent)
diagonals congruent but not perpendicular
diagonals perpendicular and congruent
4 sides congruent and 4 sides perpendicular
all 4 sides congruent. consecutive sides not perpendicular
