If base of a Pyramid is found to be polygonal shape means then such pyramid is called as Regular pyramid. Shape of the base decides the type of the pyramid. This Lateral Surface Area of a Regular Pyramid using slant height formula in this page is used to determine the LSA of Regular Pyramid. Regular pyramid slant height can calculated using this LSA of Regular Pyramid formula with the known input values of lateral edge and length of the base by substituting the values in the formula.