Awesome, thank you!Yes. That is now correct. However, you have found an area, not a length. That is 544 square inches. That's less than 2 ft by 2 ft if it was a square.
In fact it is a rectangle 32 inches by 17 inches (2h+8 by h+5).
Going by my judgement and @lex I can get the answer using @skeeter 's frame dimensions, which include the painting plus the frame widths.When you refer to area of the frame, what exactly do you mean? What shape is frame? You replied that it's not a rectangle. But then you keep applying the formula for area of a rectangle.
that would be the same as doing the painting plus the outer frame, but to me seems easier.