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2. Luas = s²
169 = s²
s = 13
Keliling = 4 x 13 = 52 cm
s = √36
= 6 cm
K = 4 × 6 cm = 24 cm
L = 169 cm²
s = √169
= 13 cm
K = 4 × 13 cm = 52 cm