Keliling lingkaran
[tex] \sqrt{4 \times \pi \times Luas} \\ \sqrt{4 \times 3,14 \times 28,26} \\ \sqrt{354,9456} \\ 18,84 \: cm[/tex]
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Keliling lingkaran
[tex] \sqrt{4 \times \pi \times Luas} \\ \sqrt{4 \times 3,14 \times 28,26} \\ \sqrt{354,9456} \\ 18,84 \: cm[/tex]