Respostas

2014-05-20T21:20:57-03:00
A=3
b=4
c=12 
a ordem de quem vc chama de a, b ou c nao importa

a)
Area total=2(AB+AC+BC)
At=2(3.4+3.12+4.12)
At=2(12+36+48)
At=2(96)
At=192cm²

b)
diagonal

d²=a²+b²+c²
d²=(3)²+(4)²+(12)²
d²=9+16+144
d²=196
d=√169
d=13cm
2 5 2