Question

The perimeter of a trapezoid is 39 – 7. Three sides have the following

lengths: 9, 5 + 1, and 17 – 6.
What is the length of the fourth side?

Answer 1

39-7 = 32
9, 6, 11 are your other sides

9 + 6 + 11 = 26

32 - 26 = the fourth side

the fourth side = 6

hope this helps