Jika luas juring OBC= 90 cm², maka puas juring OAD adalah.... cm²

L AOD = AOD/BOC x L BOC
L AOD = 150°/45° x 90 cm²
L AOD = 10/3 x 90 cm²
L AOD = 300 cm²

jawabannya A

90cm² / 45°=x / 150°

x=90cm²×150° / 45°
  =300cm²