What is the surface area? answer! i’ll give you a lot of points !

322.5in²

Step-by-step explanation:

The total surface area of a regular pyramid is the sum of the areas of its lateral faces and its base.

The general formula for the total surface area of a regular pyramid is

where p represents the perimeter of the base, l the slant height and B the area of the base.

perimeter of base = 3(15)

                               = 45 in

slant height = 10 in

base area of the base(triangle) = 1/2 height of base triangle * base

                                                      = 1/2 (13)*(15)

                                                      = 97.5 in²

total surface area = 1/2(45)(10) + 97.5

                               = 225 + 97.5

                               = 322.5 in²

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step-by-step explanation: