A square has 4 90 degree angles in the inside. The sum of all the inside angles of a square is 360 degrees.
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Each of the four interior angles of a square is 90 degrees in size, making the exterior angles 270° each (360° - 90°).
A square has four equal sides and four equal interior angles of 90 degrees that add up to 360 degrees.
A right angle is 90 degrees and the 4 interior angles of a square and a rectangle are all right angles.
The interior angles of any quadrilateral add up to 360 degrees. In general, the interior angles of any polygon with n sides add up to 180(n-2) degrees.
Exterior angles: 360 degrees Interior angles: 1620 degrees