Question

A square pyramid is shown below:

A square pyramid is shown. The sides of the square base are labeled 0.9 foot. The height of one of the triangular sides is labeled 4 feet

What is the surface area of the pyramid?

8.01 square feet
2.61 square feet
4.41 square feet
1.71 square feet

Answer 1

Surface area of a square pyramid

You have to find the area of each side of the pyramid and add it all up

We have 4 triangles and 1 square

area of a triangle = 1/2 * base * height
the base is 0.9
the height is 4

what is the area of one triangle?

Answer 2

3.6?

Answer 3

No

1/2 * 4 * 0.9 = ??

You forgot to multiply by 1/2 or 0.5

Answer 4

and remember, that's the area of just one triangle

so then we have to multiply that by 4 to get the area of 4 triangles

and we also still need to find the area of the square

area of square = side * side

and the side length is 0.9

Answer 5

yes and now multiply by 4

that tells you the area of the 4 triangles of the pyramid

Answer 6

so what is

1.8 * 4 =