Panjang busur AB
[tex] \frac{ \alpha }{180°} \times \pi \times r \\ \\ \frac{120°}{180°} \times \frac{22}{7} \times 7 \: cm \\ \\ 14,67 \: cm[/tex]
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Panjang busur AB
[tex] \frac{ \alpha }{180°} \times \pi \times r \\ \\ \frac{120°}{180°} \times \frac{22}{7} \times 7 \: cm \\ \\ 14,67 \: cm[/tex]