Tolong jwb! Beserta cara menghitung nya

jari jari 7 cm
luas π.r =
[tex] \frac{22}{7} \times 7 \\ = 22[/tex]

d= 14 cm

r = 14/2 = 7 cm

luas
[tex] = \pi {r}^{2} \\ = \frac{22}{7} \times {14}^{2} \\ = \frac{22}{7} \times 196 \\ = 616 \: cm^{2} [/tex]