Hello Matthew,
The tennis court has a rectangular shape; the formula for the perimeter of a rectangle is P = 2(L+w)
Using that formula: 228 = 2(L+w)
Divide by 2 on both sides: 114 = L+w
Without any additional information from the problem, the most we can say is that the formula for the length L and the width w of the tennis court is L+w = 114.
Cheers