360 degrees.
4.
The sum of angles in a quadrilateral is 360 degrees.
A quadrilateral has 360 interior degrees.360 divided by 4 is 90 degrees.
no
Yes
yes, all shapes with four sides are quadrilaterals - a square is a special case with all sides equal and all angles 90 degrees
All of them.
Square
Yes
Yes.
Quadilateral.