Penjelasan dengan langkah-langkah:
Lp = 4πr²
Lp = 4 × 22/7 × 21 × 21
Lp = 4 × 22 × 3 × 21
Lp = 5.544 cm²
Lp Bola
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Penjelasan dengan langkah-langkah:
Lp = 4πr²
Lp = 4 × 22/7 × 21 × 21
Lp = 4 × 22 × 3 × 21
Lp = 5.544 cm²
Lp Bola