[tex]l = \pi {r}^{2}[/tex]
486 = 3,14 × r²
r² = 486 : 3,14
r² = 154,8
[tex]r = \sqrt{154.8} [/tex]
r = 12,4
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[tex]l = \pi {r}^{2}[/tex]
486 = 3,14 × r²
r² = 486 : 3,14
r² = 154,8
[tex]r = \sqrt{154.8} [/tex]
r = 12,4
Maaf jika ada kesalahan, semoga membantu