Answer:
angles A & C are congruent and measure 107 degrees
angles B & D are congruent and measure 73 degrees
Step-by-step explanation:
in a parallelogram, opposite angles are equal and adjacent angles are supplementary (add to 180 degrees)
you can do the following to solve for 'x': 5x + 17 + 4x + 1 = 180
combine like terms: 9x + 18 = 180
subtract 18: 9x = 172
divide by 9: x = 18
substitute 18 for 'x' in the expression 5x + 17 to get 107
substitute 18 for 'x' in the expression 4x + 1 to get 73
check to make sure angles A and B add to 180
