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Pelajaran :MatematikaKelas :7
Bab :8
Nama Bab :Segitiga dan Segi Empat
Kode mapel:2
Kode :7.2.8
Jawab:
misal L tidak diarsir=x
L ABD=5cm×6cm/2
=5cm×3cm
=15cm²
L ABC=6cm×(5cm+4cm)/2
=3cm(9cm)
=27cm²
L diarsir=L ABC-x+L ABD-x
24cm²=27cm²+15cm²-2x
-2x=24cm²-42cm²
x=-18cm²/-2
x=9cm²