Question

please answer by solving​

Answer 1

Answer:

90°

Step-by-step explanation:

A+B=180° (adjacent angles of parallelogram)

=>(A+B)/2=180/2

=>A/2+B/2=90°

=>OAB+OBA=90°

& OAB+OBA=x (sum of interior opposite angles=exterior angle)

SO, x=90°