Question

Pyramid ABCDE is a square pyramid.

What is the lateral area of pyramid ABCDE ?

Answer 1

256√3 in^2.

Explanation:

tan 60 = lateral height of 1 face / 8

Lateral height = 8 tan 60 = 8√3

Area of 1 face = 8 * 8√3 = 64√3

Lateral Area = 4 * 64√3 = 256√3 in^2

Answer 2

A.
`256√(3)\text{ in}^2`

Explanation:

Please find the attachment.

We have been given an image of a square pyramid ABCDE. We are asked to find the lateral area of pyramid.

First of all we need to find the height of pyramid.

The lateral height of the pyramid will be the length of altitude drawn from the lateral face of pyramid to the base of pyramid.

Since the base of pyramid is square, so the length of segment CM will be half the length of BC that is 16.

Since tangent relates the opposite and adjacent sides of a right triangle, so we can find the lateral height as:

`\text{tan}=\frac{\text{Opposite}}{\text{Adjacent}}`

`\text{tan}(60^(\circ))=(AM)/(8)`

`√(3)=(AM)/(8)`

`√(3)* 8=(AM)/(8)* 8`

`8√(3)=AM`

`\text{Lateral surface area of pyramid}=(1)/(2)*pl`, where,

p = Perimeter of the base,

l = Lateral or slant height.

`\text{Lateral surface area of pyramid}=(1)/(2)*4*16*8√(3)`

`\text{Lateral surface area of pyramid}=2*16*8√(3)`

`\text{Lateral surface area of pyramid}=256√(3)`

Therefore, the lateral surface area of our given pyramid is
`256√(3)` square inches and option A is the correct choice.