Jawaban:
[tex]keliling = \pi \times d \\ d = \frac{keliling}{\pi} \\ d = 66 \div \frac{22}{7} \\ = 66 \times \frac{7}{22} \\ = 21 \: cm[/tex]
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Jawaban:
[tex]keliling = \pi \times d \\ d = \frac{keliling}{\pi} \\ d = 66 \div \frac{22}{7} \\ = 66 \times \frac{7}{22} \\ = 21 \: cm[/tex]
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