ABCD m<B=3x+45 and m<D=5x+23. Find m<C, Its a parallelogram. Since it is a parallelogram then 3x + 45 + 5x + 23 = 180
the angles are complimentary.
8x + 68 = 180
8x = 180-68
8x = 112
x = 14
m<B=3x+45 = 3*14 + 45 = 42 + 45 = 87
m<D=5x+23 = 5*14 + 23 = 70 + 23 = 93
87 + 93 = 180
I do not know which angle correlates to angle c it is one of these