tolong dijawab besuk dikompol

3,5x3,5x22/7=38,5cm 38,5cm÷2=19,25cm(A).

d = 7 cm

[tex]r = \frac{d}{2} \\ r = \frac{7}{2} \\ r = 3,5~cm[/tex]

sudah diketahui r = 3,5 cm maka :

[tex]L = \frac{1}{2} \pi {r}^{2} [/tex]

[tex]L = \frac{1}{2} \times \frac{22}{7} \times 3,5 \times 3,5[/tex]

[tex]L = \frac{11}{7} \times 12,25[/tex]

[tex]L = 1,5 \times 12,25[/tex]

[tex]L = 19,25~{cm}^{2} [/tex] [ opsi. A ]