Answer:
Angle D = 55 degrees
Step-by-step explanation:
Solve for angles A and C first. They are equal because they are congruent. Set the equations equal to each other. (13x - 25) = (9x - 1). Add 25 to both sides so it equals 13x = 9x +24. Subtract 9x from both sides to get 4x = 24. Divide 4 from both sides leaving x = 4. Plug 4 into either equation to get 35 degrees. A parallelogram's angles have to equal 180 degrees. Take angles A and C and add them together. They equal 70 degrees. Take 180 - 70 to get 110 degrees. Divide 110 by 2 to get angle D which is 55 degrees.
