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Pelajaran :Matematika
Kelas :9
Bab :1
Nama Bab :Kesebangunan dan Kekongruenan
Kode mapel:2
Kode :.2.
Jawab:
l karton=20cm+3cm+3cm
=26cm
tinggi karton=26cm/20cm×30cm
=39cm
Luas karton di bawah=p×l
=(39cm-3cm-30cm)×26cm
=6cm×26cm
=156cm²