Q: What is the area of this figure?
Explanation: Cut the figure into two rectangles as shown. Find the missing vertical length by noticing that the two shorter vertical lengths must add up to the long vertical length. The missing vertical length is 3, because 4 + 3 = 7. Do the same for the missing horizontal length. It is 5, because 6 + 5 = 11.
Now, find the area of each rectangle (A = length x width). The one on the left is 7×6 = 42. The one on the right is 3×5 = 15. Add these areas to find the area of the original figure: 42 + 15 = 57.