So the combined area, I'll write it a sub c, is going to be equal to the area of my triangle, a sub t, plus the area of my square. Well, the area of my triangle, we know what it's going to be. It's going to be square root of 3 times the length of a side squared divided by 4. So it's going to be square root of 3. Let me do that in that same yellow color. It's going to be, make sure I switch colors, it's going to be square root of 3 over 4 times the side squared, times x over 3 squared. All I did is the length of a side is x over 3.