Question

What is the surface area of a cube with a edge length of 8 inches?

Answer 1

check the picture below.

so the cube is really six 8x8 rectangles, and since the area of one of those rectangles is just 8*8, then the area of all six is 6(8*8).

Answer 2

Answer: 384 in.²

Step-by-step explanation: Surface area is the sum of the areas of all of the faces of a three-dimensional figure.

To find the surface area of a cube, notice that each face of a cube has the same area so we can simply find the area of one face of a cube and multiply it by the number of faces which is 6.

To find the area of one face of a cube, we can use the formula for the area of a square which is as followed.

Area = side²

Since the length of a side is 8 inches we have (8 in.)² or 8 inches × 8 inches which is 64 inches².

Now since there is six sides to a cube, we will multiply 64 inches² by 6.

(64 in.)² (6) = 384 in.².

Therefore, the surface area of the cube is 384 in.².