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Well, isn't that a happy little question! A heptagon, with its seven sides, can have a maximum of seven perpendicular lines. Each side can have one perpendicular line drawn from it, creating a lovely pattern of right angles within the shape. Just remember, there are no mistakes, only happy little perpendicular lines waiting to be discovered!
A square has four perpendicular sides.
The following is the answer.
yes
No, it does have 3 sets of parallel sides though.