Question

The angle of quadrilateral is 110 120 55 and x ?find x

Answer 1

the sum of all angles of a quadrilateral

is 360°



therefore


$110 + 120 + 55 + x = 360 \\ \\ 285 + x = 360 \\ \\ x = 360 - 285 \\ \\ x = 75$


hence the value of x = 75°

Answer 2

heya...

your answer is:

110+120+55+x = 360

285+x = 360

x = 360 -285

x = 75.

It may help you...☺☺