![]() ![]() Let us first identify the top and bottom face combination, to get the area of it, the sides that we have to multiply are side a and side c.Now, we have to identify 3 face combinations: (1) top and bottom, (2) front and back, and (3) right and left.Therefore, we only need to identify 3 rectangular faces.However, we know that the top and the bottom faces are the same, the left and the right faces are also the same, and the front and back faces are also the same.However, we cannot use the same method we used for computing for the surface area of a cube since the faces of a rectangular prism are not equal. Now, a rectangular prism is composed of 6 faces.To find the area of a rectangle, we just need to multiply the length and the width.Wherein s represents the length of the side.Thus, if we want to get the surface area of a cube, we need to use the equation:. ![]() But we also have to keep in mind that there are 6 faces in a cube, therefore we have to multiply it by 6.Therefore, if we want to get the surface area of a cube, we can first get the area of one face (one square). ![]()
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