In parallelogran ABCD , angle A = 70 , find angle B , C ,D

a=70

a=c

c=70

a+d=180(linear pair)

70+d=180

d=110

d=b

b=110

a=c (opp. angle)

so c =70

now b=d

so a+c+b+d=360(asp)

now 140+2b=360

2b=220

b=110

d=110

a=c=70