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P = 3L
2P = 6L
Keliling = 2P + 2L
2P + 2L = 64
6L + 2L = 64
8L = 64
L = 64/8
L = 8 cm
P = 3L
P = 3(8)
P = 24 cm
Luas = PL
= (8)(24)
= 192 cm²
K = 2 (p+l) = 64
2 (3L+L) = 64
8L = 64
L = 8
P=3L=3.8=24
Luas= PxL = 24x8 = 192
jawbnanya B