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360 degrees
yes
A square has 4 90 degree angles in the inside. The sum of all the inside angles of a square is 360 degrees.
The 4 interior right angles inside a square add up to 360 degrees
-- The sum of the four exterior angles is 360 degrees. -- The sum of the four interior angles is also 360 degrees. -- So the sum of all the interior and exterior angles is 720 degrees.