Question

Calcule o perímetro do triangulo ADE, sabendo que BC//DE

Answer 1

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