tolong di jawab....!!!

Diket =
d =√8
r = d/2 = √8 : 2 = √4 = 2 cm

K lingkaran
= 2 Π r
= 2 × 3,14 × 2
= 2 × 6,28
= 12,56 cm

Semoga membantu

Jwabannya yang A