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=42 cm×50=2100
luas persegi panjang=(42cm-18)×24=576
luas gabungan=2100+576=2676 cm2
= 50×60
=3000cm
Luas2=s×s
=24×24
=576cm
Luas seluruhnya
= Luas1+Luas2
=3000+576
=3576cm
maaf kalau salah:)