Figura 1:
[tex]\begin{array}{l}P=4+5.6+12+5.6=27.2\\A=\frac{12+4}{4}=12\end{array}[/tex]
Figura 2:
[tex]\begin{array}{l}P=8.9+12+5.6=26.5\\A=\frac{4\cdot12}{2}=\frac{48}{2}=24\end{array}[/tex]
Figura 3:
[tex]\begin{array}{l}P=4.5\cdot4=18\\A=\frac{8\cdot4}{2}=\frac{32}{2}=16\end{array}[/tex]
