Marty R. answered 02/18/20
Tutor
4.9
(266)
Tutor for all levels of Math and History, and many more subjects
Every quadrilateral has a combined total measure of 360. You have 4 sides, 255 and 25, then you substitute x for the remaining ratios 3x and 5x.
Add them all together and solve for x
255 +25 +3x +5x =360