Question

one angle of a parallelogram is 90 degree what are the other three angle

Answer 1

Hi
If ane angle of parallelogram is 90degree mean adjoinig angle is 180-90=90 as sum of adjoining angles is 180degrees as oppsite angles are equal means each angle is 90 degree mean it is a rectangle.

Answer 2

in parellelogram, opposite sides are equal.
the first pair of opp. angles be x
the 2nd pair of opp angles be each 90¤
angle sum of quadrilateral=360¤
90+2x=360
2x=270
x=270/2=135¤
90¤+90¤+135¤+135¤=360