Question: how to find the surface area of a equilateral triangular prism?
Answer: In the prism, l is the height of the prism and w is the length of one side of the triangular base and is normally denoted as s . If the triangular base has unequal sides then you calculate the perimeter (p) of the triangle and multiply it by the height of the prism to get the area of the sides (lateral surface area).