human
Calculate the perimeter of a rectilinear shape by adding lengths expressed in the same units What is the perimeter of this composite shape made from rectangles? ![A composite shape made from three rectangles that form upside down step structure.  The base of the shape is horizontal and is 12m long. The vertical height of the whole shape is 27m. The horizontal width of the top part of the shape is 32m. The horizontal width of the top step is 15m. The vertical height of the top rectangle is 9m. The vertical height of the bottom rectangle is 10m. ]() \( 105 \mathrm{~m} \)
gpt
When calculating perimeter, only adds the marked lengths