how many degrees in trapezoid
If that first angle is 130 degrees and the two small corners are 20 degrees, when we make those last two lines meet, the angle has to be 190 degrees. 130 + 20 + 20 + 190 = 360. No matter how you change the angles, they always add up to 360. The Perimeter of Any Quadrilateral is just the sum of the four sides. In this quadrilateral, the sides, in inches, are 4, 4, 5 and 2. Therefore, the perimeter is 4 + 4 + 5 + 2, or 15 inches.