Jari-jari lingkaran
[tex] \sqrt{Luas \div \pi} \\ \sqrt{3.850 \div \frac{22}{7} } \\ \sqrt{3.850 \times \frac{7}{22} } \\ \sqrt{1225} \\ 35 \: cm \\ \\ Keliling \: lingkaran \\2 \times \pi \times r\\ 2 \times \frac{22}{7} \times 35 \: cm \\220 \: cm[/tex]
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Jari-jari lingkaran
[tex] \sqrt{Luas \div \pi} \\ \sqrt{3.850 \div \frac{22}{7} } \\ \sqrt{3.850 \times \frac{7}{22} } \\ \sqrt{1225} \\ 35 \: cm \\ \\ Keliling \: lingkaran \\2 \times \pi \times r\\ 2 \times \frac{22}{7} \times 35 \: cm \\220 \: cm[/tex]