Regular triangular pyramid has 6 cm long base edge and slant height k=9 cm. Find the lateral area of the pyramid.

The lateral surface area of a pyramid is expressed as four times the half of the product of its base and the height where the height is the slant height. Calculated as follows:

Area = 4 (1/2) (Base) (Height) Area = 4 (1/2) (6) (9) Area = 108 cm^2

Thus, the lateral area is 108 cm^2.