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luas = 12 x 16 = 192cmpersegi
keliling =2(12+16)= 56
= √(20²-16²)
= √(400-256)
= √144
Lebar = 12 cm
b. keliling = (2*panjang) + (2*lebar)
keliling = (2*16) + (2*12)
keliling = 32+24
keliling = 56 cm
Luas = panjang * lebar
Luas = 12*16
Luas = 192 cm²