Question

Consider a regular pyramid where p is the perimeter of the base, s is the slant height, ba is the base area, and la is the lateral area. what is the valid formula for the surface area

Answer 1

Surface area = ba + ph

Answer 2

Answer:

Surface area = ab + 1/2 (ps)

Step-by-step explanation:

Surface area of a regular pyramid is represented by the formula

Surface are = area of base + area of lateral surfaces

                   = ab + 4   [1/2 (one side of the base) (slant height)]

                   = ab + 1/2  [4 × (one side of the base) ( slant height)]

                   = ab + 1/2  [(perimeter of base) × (slant height) ]

                   = ab + 1/2    [p×s]

Surface area = ab + 1/2 (ps)