Answer: If you want your answer in area, it would be 12.5. If you want your answer in perimeter, it would be 20. I'm actually not really sure about the answer in area so if you get it wrong I'm sorry. I hope this helps.
Step-by-step explanation:
AREA: Since the parallelogram has an area of 50 square units and we know one side is 5, the opposite side must also be 5. Multiply the two 5's together and get 25. We know 12x2=24, so 12.5x2 must be 50.
PERIMETER: Since the parallelogram has an area of 50 square units and one side is 5 units, the opposite side is also 5 units. Add it together to get 10. Then subtract 10 from 50, you get 40. 40 divided by 2 is 20, so one side must be 20. To check your work, add all the sides together. (20+20+5+5)
