Question

Check out this triangular prism:

5
7
6
Find the surface area of the triangular
prism (above) using its net (below).
7
6
5
5
4
units2

Answer 1

Explanation:

b- base of the triangle = 6

h - height of the triangle = 4

L = length of the rectangles = 7

s₁ = breadth of the base rectangle = 6

S₂ = breadth of the right rectangle = 5

s₃ = breadth of the left rectangle = 5

Surface area of the prism = bh + L*(s₁ + s₂ + s₃)

= [ 6*4 ] + 7 * (6+5+5)

= 24 + 7*16

= 24 + 112

= 136 square units