Find the sum of the lengths of all edges and the surface area of the cube if its edge is 7 cm.

To solve this problem, remember that a cube is a hexagon in which all 6 faces are equal squares. The cube has 12 equal edges. Let’s calculate what the surface area of the cube is, knowing that its edge is 7 centimeters. The area of a square is equal to the square of its side. S = a ^ 2.
S = 6 * 7 * 7 = 294 square centimeters.
Let’s calculate what is the sum of the edges of the cube.
12 * 7 = 84 cm.
Answer: 294 sq. Cm. 84 centimeters.