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bc = 0,5 m
cd = 5/3 . 1,5
cd = 2,5 m
de = 2/3 . 1,5
de = 1 m
prbndngan ab=3
3:1,5cm=2
prbndingan bc=1
bc=1*2
=2cm
prbndngan cd=5
cd=5*2
=10cm
prbndngan de=2
de=2*2
=4cm