tolong di jawab yah kak

jawaban : pedagang = 360°- (120°+30°+60°+60°) = 360° - 270° = 90°
mencari pedagang = 90/360 x 120 = 30 anak

pedagang=360-(120+30+60+60)
=360-270
=90°

pedagang=90/360×120
=30

jadi , siswa yang orang tuanya pedagang ada 30 anak