Question

What is the total surface area of the triangular prism in square centimeters?

A 240 cm^2
B 368 cm^2
C 320 cm^2
D 344 cm^2​

Answer 1

D

Explanation:

base area = (6 · 4)/2 = 24/2 = 12 cm²

half base length = 6 : 2 = 3 cm

leg =
`√(3^2+4^2) = √(9 + 16) = √(25) = 5` cm

perimeter = (5·2) + 6 = 10 + 6 = 16 cm

lateral area = 16 · 20 = 320 cm²

surface area = (2 · 12) + 320 = 24 + 320 = 344 cm²