Question

in quadrilateral angle A=110degree, angle B=75degree,angle C=35degree. find angle D

Answer 1

angle A =angle C {as it is a parallelogram}
so, angle C = 110
angle B=angle D [ in a parallelogram opposite angles are equal ]
=180-110=70
so angle B,D = 70

Answer 2

a+b+c+d=360
110+75+35+d=360
110+110+d=360
220+d=360
d=360-220
d=140 degrees