Question

solve the following fast ?

Answer 1

as angle BOD and angle DOF is equal to 140 tht makes x is equal to
$180 - 140 = 40{angle sum property}$
z is equal to 50 degree beacause of vertically opposite angles
same with y, it is vertically opposite to x.
x is equal to 40
therfore t is equal to 180 - (z plus x)
$180 - 50 + 40 = 90$
it can also be by vertically opposite angle of angle BOD and AOC.