Use a net of the square pyramid, if necessary, to find the surface area of the pyramid.

27 units squared

Step-by-step explanation:

First, we find the surface area of one of the triangles.

(3*3*0.5)

4.5

Next, we find the surface area of all of the triangles.

(4.5*4)

18

The next step is to find the surface area of the square.

(3*3)

9

The last step is to add the surface areas of the square and triangles together.

(18+9)

27

The surface area of the entire shape is going to be 27 units squared.

is only a line? i think so

step-by-step explanation:

a and d