Question

Find the measure of angle x

Answer 1

Hey there, here is your solution,



As it is a quadrilateral..

Sum of angles = 360

= 80 + 70 + 90 + x = 360

= 240 + x = 360

= x = 360 - 240

x = 120 Degree Ans.

Answer 2

90°+70° +80° + x = 360°
240° + x = 360°
X = 360° - 240°
X = 120 °