Question

A square pyramid is shown below:

A square pyramid is shown. The sides of the square base are labeled 0.7 foot. The height of one of the triangular sides is labeled 8 feet.

What is the surface area of the pyramid?

please pick from the 4 below

11.69 square feet

3.29 square feet

7.49 square feet

2.24 square feet

Answer 1

11.69

Explanation:

the answer is A

Answer 2

let Surface Area A, a the base edge and h the height:

A = a²+2a√(a²/4+h²)

h=?

pythagorean theorem:

h²=c²-a²

h=√(c²-a²)

h=√(8²-(.7/2)²)= 8

plug it in the above equation A= 11.7ft²

So A is correct