Luas daerah yang diarsir
[tex] \frac{ \alpha }{360°} \times \pi \times r \times r \\ \\ \frac{(360 °- 240°)}{360°} \times \frac{22}{7} \times 42 \times 42 \\ \\ \frac{120°}{360°} \times 5.544 \\ \\ 1.848 \: {cm}^{2} \: (A)[/tex]
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Luas daerah yang diarsir
[tex] \frac{ \alpha }{360°} \times \pi \times r \times r \\ \\ \frac{(360 °- 240°)}{360°} \times \frac{22}{7} \times 42 \times 42 \\ \\ \frac{120°}{360°} \times 5.544 \\ \\ 1.848 \: {cm}^{2} \: (A)[/tex]