Question

Given that angle a= 168 work out x



REALLY NEED HELP 21P !!

Answer 1

one angle = 90°
the other 3 angles = 360 - 90 = 270

so
x + 2x + a = 270 but a = 168
3x + 168 = 270
3x = 102
  x = 102/3
  x = 34

answer
x = 34