tolong ya kak... no 8,9,10

8. (90/360) x 40
(1/4) x 40 = 10 siswa

9. besar sudut nelayan :
360 - (90+72+54+108) = 360 - 324 = 36
banyak siswa yang orang tuanya nelayan :
(36/360) x 40 = (1/10) x 40
= 40/10 = 4 siswa

10. selisih = 108 - 72 = 36
banyaknya = (36/360) x 40
= (1/10) x 40
= 40/10 = 4 siswa