Answer:
40.5 square feet
Step-by-step explanation:
The formula for finding the area of a rhombus is (diagonal 1 x diagonal 2)/2. Since you're given the side of the rhombus, you can use the 45:45:90 degree triangle rule where the measure of the sides is 1:1:[tex]\sqrt{2}[/tex] to find the diagonals (both equal 9 feet).
9x9/2 = 81/2 = 40.5 [tex]ft^{2}[/tex]
Hope this helps!
