8) Luas Permukaan = (2 x Luas segitiga) + (Keliling segitiga x tinggi prisma) L = (2 x 1/2 x 9 cm x 12 cm) + ((9 cm + 12 cm + 15 cm) x 11 cm) L = 108 cm² + (36 cm x 11 cm) L = 108 cm² + 396 cm² L = 504 cm²
9) D = 14 cm r = D/2 = 14 cm / 2 = 7 cm t = 8 cm s = 14 cm
Volume = Volume tabung + Volume kubus V = π.r².t + s³ V = (22/7 x 7 cm x 7 cm x 8 cm) + (14 cm)³ V = 1.232 cm³ + 2.744 cm³ V = 3.976 cm³
Verified answer
8)Luas Permukaan = (2 x Luas segitiga) + (Keliling segitiga x tinggi prisma)
L = (2 x 1/2 x 9 cm x 12 cm) + ((9 cm + 12 cm + 15 cm) x 11 cm)
L = 108 cm² + (36 cm x 11 cm)
L = 108 cm² + 396 cm²
L = 504 cm²
9)
D = 14 cm
r = D/2
= 14 cm / 2
= 7 cm
t = 8 cm
s = 14 cm
Volume = Volume tabung + Volume kubus
V = π.r².t + s³
V = (22/7 x 7 cm x 7 cm x 8 cm) + (14 cm)³
V = 1.232 cm³ + 2.744 cm³
V = 3.976 cm³