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Df=6cm
Ef=8cm
<A=90+60=120=180-120=60
<B=30
<C=90
<D=90
<E=60
4.<ACB=<FED
<ABC=<FDE
<BAC=<DFE
AB=DF
DE=CB
AC=FE
5.P=12CM
L=8CM
8-x=4
-x=4-8
x=4
12cm-4cm = 8 cm panjangnya