The length of each side of the squares in the figure is 9 units. Find the area of the region colored red.
+1005 There's a total area of 7 squares. 3 on the right are half-covered, so minus 1.5, and the bottom uncovered is half of 4 units, so 2.
2+1.5 = 3.5
7-3.5 = 3.5
We multiply this by 9*9 to get the total.
