bantuin kakakkkkkkkkkkkk,isi sama caranya
Penjelasan dengan langkah-langkah:
1. r = 12 cm
d = 12 × 2 = 24 cm
K = 3,14 ×24
K = 75,36 cm
2. Keliling = π d
78,5 = 3,14 × d
25 cm = d
r = 25/2 = 12,5 cm
luas = π r^2
luas = 3,14 × 12,5^2
luas = 3,14 × 156,25
luas = 490,625 cm^2
#semoga membantu
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