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Luas = P X L
128 = 2L x L
2L² = 128
L² = 64
L= 8 ...P= 16
Keliling = 2 (P + L)
= 2 ( 8 + 16)
= 2 x 24 = 48
Jadi Keliling = 48cm
p.l = 128
2x.x = 128
2x² = 128
x² = 128/2
x² = 64
x = 8
keliling = 2 (p+l)
= 2 (2.8 + 1.8)
= 2 (24)
= 48