Question 128
Two congruent right triangles have measurement legs $4~\mathrm{cm}$ and $7~\mathrm{cm}$. In the figure below, on the left, the triangles were designed to match the legs of $7~\mathrm{cm}$. Thus, $AB=7~\mathrm{cm}$ and $AD=BC=4~\mathrm{cm}$. In the figure on the right, they were designed to match the hypotenuses from where, $AD=BC=4~\mathrm{cm}$ and $AC=BD=7~\mathrm{cm}$. 
Calculate the shaded areas in the two figures.
Calculate the shaded areas in the two figures.