minta tolong dijawab ya hehe.. 2 nomor ><

120/90 × 15 = 20 cm 2
No 12
Luas lingk = 22/7 × r^2
616 × 7/22 = r^2
196 = r^2
14 = r
Pjg bsr = 1/4 × 2 × 22/7 × 14 = 22

Maaf kalau jawabannya salah