tolong pakai caranya makasi

1. rumus I = P × L =
Panjang= 12
Lebar= 8
12×8 = 96
rumus II = P × L =
Panjang= 12 + 4 = 16
Lebar= 20 - 8 = 12
16 + 12 = 28
192+96= 288 cm

2. Rumus I= p×l =
Panjang= 16
Lebar= 8
16×8= 128
Rumus II= a×t per 2
alas= 8+4+4=16
tinggi= 5
16×5 per 2/16×5÷2 = 80÷2 = 40
128 + 40= 168 cm

Sorry lama