Question

please solve this question

Answer 1

let centre =O
angle VOU=x (vertically opposite angle)
angle XOW=z (vertically opposite angle)

angle COT =180 (angle on straight line )
but angle COT= angle s+angle y+angle r + angle t+ angle VOU + angle XOW

but angle VOU=x and angle XOW=z
angle x+y+z+r+s+t= 180