Question

Here is a picture of a cube, and the net of this cube.

Answer 1

Answer: $864\text{ mm}^2$

Step-by-step explanation:

Given: the side length of the cube = 12mm

The surface area of the cube is given by :-

$\text{Surface area }=6(side)^2$

Therefore, the surface area of the given cube will be :-

$\text{Surface area }=6(12)^2=6\times144=864\text{ mm}^2$

hence, the surface rae of the cube is $864\text{ mm}^2$

Answer 2

SA= 6s^2 (s= side length)
= 6(12)^2
=864 mm