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Verified answer
A. Volume PrismaVolume = Luas Alas x tinggi
= (1/2 x (jumlah sisi sejajar) x tinggi trapesium) x tinggi prisma
= (1/2 x (11+5) x 8) x 20
= 64 x 20
= 1280 cm³
B. Luas Permukaan
Keliling Trapesium = 8 cm + 11 cm + 10 cm + 5 cm = 34 cm
Luas Permukaan =(2 x Luas Trapesium)+(Keliling Trapesium x tinggi prisma)
= (2 x 64 cm²) + (34cm x 20cm)
= 128 cm² + 680cm²
= 808 cm²
v =( 1/2 x (5+11) x 8) x 20
v = 64 x20
v = 1280 cm³
B . luas permukaan prisma =
2 x luas alas + ( 8+5+10+11)x20
= 2 x 64 + 34x20
= 128 + 680
= 808 cm²