Explicación paso a paso:
[tex]perimetro = 2(base) \times 2(altura)[/tex]
[tex]36.8 = 2(12.4) + 2x[/tex]
[tex]36.8 = 24.8 + 2x[/tex]
[tex]36.8 - 24.8 = 2x[/tex]
[tex]12 = 2x[/tex]
[tex]6 = x[/tex]
HALLANDO AREAS:
[tex]area = 12.4 \times 6[/tex]
[tex]area = 74.4 \: {cm}^{2} [/tex]
