Answer:
area of lateral faces = 60 cm²
Step-by-step explanation:
The lateral area of the triangular prism can be calculated as follows:
lateral area = s₁h₁ + s₂h₂ + s₃h₃
We have:
h₁ = h₂ = h₃ = height of prism = 5 cm
Therefore, the formula became:
lateral area = h (s₁ + s₂ + s₃)
We area given that:
s₁ = 3 cm
s₂ = 4 cm
s₃ = 5 cn
Substitute with these givens in the above equation to get the lateral area as follows:
lateral area = 5 (3+4+5)
lateral area = 5(12)
lateral area = 60 cm²
Hope this helps :)