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Luas 1
4 cm x 5 cm : 2
= 10 cm2
Luas 2
20 cm x 8 cm
160 cm2
Luas gabungan
10 cm2 + 160 cm2 = 170 cm2 (C)
Nomor 11
15 + 4 + 4 + 4 + 14 + 9 + 30
= 80 (A)
Nomor 12
A. Persegi panjang