Answer:
11 inches
Step-by-step explanation:
Perimeter of each rectangle = 33 inches
The square cake is cut in half
which means two half sides would equal one whole side.
2 × 1/2 = 1
The two "halves" in the smaller rectangle would equal one whole side + the two whole sides in the smaller rectangle
1 + 2 = 3
Each side of the original square cake = 33 inches / 3
= 11 inches
Each side of the original square cake = 11 inches
