Resposta :
Resolução!
[tex]p = 2(b + h) \\ p = 2(20 + 15) \\ p = 2.35 \\ p = 70cm {}^{2} \\ \\ \\ > > > > > > > > > > > > > > > > > > > > > > > > > > > > > \\ \\ a = b.h \\ a = 20.15 \\ a = 300cm {}^{2} [/tex]
[tex]p = 2(b + h) \\ p = 2(20 + 15) \\ p = 2.35 \\ p = 70cm {}^{2} \\ \\ \\ > > > > > > > > > > > > > > > > > > > > > > > > > > > > > \\ \\ a = b.h \\ a = 20.15 \\ a = 300cm {}^{2} [/tex]