Ross is building a model of a square pyramid for a class project. The side length of the square base is 18 inches and the slant

Question

2 years ago

6

height of the pyramid is 19 inches. What is the surface area of the model pyramid?
A. 666 in.2

B. 684 in.2

C. 1008 in.2

D. 495 in.2

1 answer:

Rasek [7] · Answer 1 · 2022-06-07T11:14:09+03:00

Surface area of a square pyramid

= area of the base + 4 times area of one of the slanted faces

Area of the base = side length * side length = 18*18 = 324

Area of one slanted face = (1/2) * side length * slant height = 1/2*18*19 = 171

Surface area = 324 + 4 * 171

= 1008 in.2

ans is C