tolong dijawab segera yaaa kawan-kawan

Diket.
D1 = 8 cm
D2 = 4 cm
L. sisi tegak prisma = 160 cm^2
alas segitiga = √4^2+√3^2
= √16 + √9
= √25
= 5 cm
tinggi prisma =?
L. sisi tegak prisma = 4(a×t/2)
160 cm^2 = 4×(5×t/2)
320 = 4 × 5t
320 = 20t
16 cm = t

V. prisma = L.alas × t
= (D1×D2/2) × t
= (8×4/2) × 16
= 256 cm^2