To comply with the formula for any polygon (number of sides-2)*180 = total sum of interior angles.
A quadrilateral has 4 sides so: (4-2)*180 = 360 degrees
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The interior angles of a triangle add up to 180o. The interior angles of a square add up to 360o. Other shapes have other angles.
The 4 interior angles of a quadrilateral add up to 360 degrees
The 4 angles in a quadrilateral add up to 360 degrees.
They sides if a quadrilateral can add up to anything but the angles have to equal 360
All the interior angles add up to 360 degrees.