Respostas

  • Usuário do Brainly
2014-05-19T17:11:00-03:00
18/12=x/8
x=8.18/12
x=12 ( Base do triangulo)

18/12=10+y/10
y=10.18/12-10
y=5

L=y+10
L=5+10=15

P=L+x+18
P=15+18+12 =45

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