Sama rumus nya ya sayang
Penjelasan dengan langkah-langkah:
jari jari = 28 ÷ 2 = 14
k = 14 + 14 + 14 + 14 + 1/4k + 1/4k
k = 28 + 28 + 2/4k
k = 56 + 2/4 × 2πr
k = 56 + 2/4 × 2 × 22/7 × 14
k = 56 + 4/4 × 22 × 2
k = 56 + 1 × 44
k = 56 + 44
k = 100 cm
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