The perimeter of the rectangle is 64cm, since Edmond has two equallu sized triangles of plywood, we can conclude:
[tex]\begin{gathered} P=224\operatorname{cm} \\ P_t=\frac{224}{2}=112\operatorname{cm} \end{gathered}[/tex]The perimeter of each triangle is 32cm
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Let's find x using pythagorean theorem:
[tex]\begin{gathered} x=\sqrt[]{w^2+l^2} \\ x=\sqrt[]{55^2+48^2} \\ x=73 \end{gathered}[/tex]Therefore:
[tex]\begin{gathered} P=48ft+55ft+73ft \\ P=176ft \end{gathered}[/tex]