[size=100][size=150]The [b]length (l)[/b] of each side to find perimeter.[br]The[b] slant height (s)[/b] for the height of each triangle.[br]The [b]height (h)[/b] of the pyramid is calculated by the Pythagorean Theorem.[/size][/size]

Good Page:[br]https://thirdspacelearning.com/us/math-resources/topic-guides/geometry/math-nets/