Saugatuck/Douglas have the nod in restaurants. All three have nice shops although I'd rank them Saugatuck, South Haven, St. Joseph, then Douglas. Unless I had a house on the beach in Union Pier I probably wouldn't consider it compared to the other locations. St Joseph continues to impress however.
A right trapezoid has exactly one pair of perpendicular lines and is a quadrilateral. 6 people found this useful.
Perpendicular lines are a bit more complicated. If you visualize a line with positive slope (so it's an increasing line), then the perpendicular line must have negative slope (because it will be a decreasing line). So perpendicular slopes have opposite signs.