tolong banget bantu nomor 29-33.klo bisa pake cara yaa.terimakasih banyak

29. B.2
30. B.6
31. total rusuk = 12 × 5 = 60 cm
32. Lp = 6 × 12 × 12 = 864 cm
33.Lp = 2 ( 10 × 5 + 6 × 5 + 10 × 6 )
= 2 ( 50 + 30 + 60 )
= 2 × 140 = 280 cm