360 degrees
a regular quadrilateral is a square that has all the same angles (right) and side measurements.
If it is a quadrilateral it cannot be "not a quadrilateral"!
Because a quad has 4 wheels and a quadrilateral has 4 sides!
A quadrilateral is a polygon with 4 sides... so if it has 4 sides it is a quadrilateral. your question doesnt make sense because a 4 sided quadrilateral could be any quadrilateral at all.
A quadrilateral has 4 sides.
quadrilateral
A quadrilateral has 4 sides
an isosceles trapeziod could be a quadrilateral because it has 4 sides and a quadrilateral has 4 sides
Quadrilaterals have a constant total angle measurement of 360 degrees
It is simply a quadrilateral - there is no special name for such a quadrilateral.
A quadrilateral with 4 right angles is a rectangle