<span>29.26 inches.
Since the object Robbie drew is a square, we know that all 4 sides are the same length and the area of the square is L^2, where L is the length of one side. So
A = L^2
856 in^2 = L^2
sqrt(856 in^2) = l&2
29.26 in = L
So the length of one side is approximately 29.26 inches.</span>
Answer:
27.60
Step-by-step explanation:
First you can solve the triangle. complete the triangle my making the final side which would equal 12 because the top and bottom are bith 6. and the bottom is 12 then you do 1/2(12)(12) to find the area which would be 72. the area of the rectangle would be 18 so the total would be 90ft^2 when you add them together