Question

Does anybody know this? I had it right before but now I don't remember the answer. Find the surface area of the square pyramid.

Answer 1

The surface area of the square pyramid is 280 units².

Explanation:

As we know that the total surface area of a square pyramid can be obtained by identifying the length 'b' of its base and its slant height 's' by using the formula:

`A=2bs+b^2`

From the figure, it is clear that

• length of its base = 'b' = 9

• slant height = 's' = 10

substituting the values in the formula

`A=2bs+b^2`

`A=2`
`(10)`
`(9)+(10)^2`

`=2`
`(10)`
`(9)+100`

`=280`

Therefore, the surface area of the square pyramid is 280 units².