Luas persegi :
= s × s
= 19 × 19
= 361 cm²
Keliling persegi :
= 4 × s
= 4 × 19
= 76 cm
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Luas persegi :
= s × s
= 19 × 19
= 361 cm²
Keliling persegi :
= 4 × s
= 4 × 19
= 76 cm