Respuesta :
Explanation:
its adjacent angle is 180 - 60= 120⁰
its opposite angle is equals to 60⁰
60 + 60 + x + x = 360 (because opposite angle of parallelogram is equal)
120 + 2x = 360
2x = 360 - 120
2x = 240
x = 240 / 2
x = 120
hence x=120
{here x is adjacent angle}
and the opposite angle is 60 degrees