mohon dijawab dengan benar ya, pakai caranya ya...
[tex]sudut \: arsiran = 360° - 144° = 216° \\ d = 70cm→r = 35cm \\ arsiran = \frac{216°}{360°} \times π \times {r}^{2} \\ l.arsiran = \frac{216°}{360°} \times \frac{22}{7} \times 35 \times 35 \\ 3 \times 22 \times 1 \times 35 \\ = 2.310 {cm}^{2} \\ jawabannya \: b[/tex]
#Semoga membantu
#dimi222
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