The lateral surface area of the triangular prism is 84 cm². option C
What is the lateral surface area of the prism?
The lateral surface area of the triangular prism = (a + b + c) × h
Where,
a = 3 cm
b = 4 cm
c = 5 cm
h = 7 cm
Substitute the values into the formula
The lateral surface area of the triangular prism = (a + b + c) × h
= (3 + 4 + 5) × 7
= 12 × 7
= 84 cm³
Therefore, the surface area of the triangular prism is 84 cubic centimeter.