Tanya dong, sulit e kak

a.
Volume prisma = luas alas * t prisma
1200 = 1/2 * 8 * 15 * t
1200 = 60
t = 20 cm

b.
Sisi miring pada alas
s² = 8² + 15²
s² = 289
s = 17 cm

Lp prisma = 2 luas alas + k.alas * t prisma
= 2 * 1/2 * 8 * 15 + (8 + 15 + 17) * 20
= 120 + 800
= 920 cm²

v. prisma = L.alas x tinggi prsma
1200 cm = (8.15 : 2) x t
1200 cm = 60 x t
1200 : 60 = 20
jadi, tinggi prisma = 20 cm²

Sisi miring = √15² + 8²  =√225 + 64
                                     =√289
                                     =17
jadi,Lp =2 x L.alas + k. alas x t. prisma
           = 2 x 1/2 x 8 x15 + ( 15 + 8 + 17 ) x 20 cm
          = 120+800
          =920 cm²