A quadrilateral is a geometrical shape which has four sides. There are four angles in a quadrilateral. The sum of measure of all the four angles of a quadrilateral is 360 degrees. The perimeter of a quadrilateral can be found by adding the measures of all the sides. The quadrilateral with opposite sides equal and parallel are called parallelogram. A square is a quadrilateral whose all sides are equal and opposite sides are parallel. Moreover, rectangle is a quadrilateral whose opposite sides are equal and parallel.

The sum of all angles of any shape can be measured from the given formula:

Sum of measure of angles = (n - 2)*180

where, n = total number of sides

Sum of measure of angles of quadrilateral = (4 - 2)*180

A quadrilateral has four sides therefore, n = 4

Sum of measure of angles = 360

Sum of measure of angles = (n - 2)*180

^{o}where, n = total number of sides

Sum of measure of angles of quadrilateral = (4 - 2)*180

^{o}A quadrilateral has four sides therefore, n = 4

Sum of measure of angles = 360

^{o}28 and 108 and 130 2x