keliling=15+4+15+4+10+10=58cm
luas persegi panjang=p×l
=20×14=280cm^2
luas persegi=s×s
=5×5=25cm^2
luas diarsir=280-(25×2)
=230cm^2
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keliling=15+4+15+4+10+10=58cm
luas persegi panjang=p×l
=20×14=280cm^2
luas persegi=s×s
=5×5=25cm^2
luas diarsir=280-(25×2)
=230cm^2