Question

one of the angle of parallelogram is 75
find the measure of remaining angle of the parallelogram​

Answer 1

Sum of angles on a parallelogram is 360

So, measure of the remaining angles = 360-75= 285 degrees

Also, opposite angles in a parallelogram are supplementary, so angle opposite to 75 degree angle = 180-75 = 105 degrees

Answer 2

opposite angles of parallelogram are same so opposite angle =75.
75+x=180. (co interior angle)
x=105
opposite angle =105