Question

if a parallelogram ABCD angle d =105 determine the measures of angle a and angle c 

Answer 1

i think the solution  is
angle d =  b angle
angle c = angle a
c+a =2x
so, if angle d = angle b then both are of same measures
so both = 105°
then 360° = 150°+150°+2x
2x = 150
as angle c = angle a so again both are of same measures
so both= 70°