How to Find the Surface Area of Cubes and Prisms
TL;DR: Surface area is the total area of every face on a 3D shape, basically, the “skin” of the solid, measured in square units. For a cube with side length s, all six faces are identical squares, so the total is 6 times s squared. For a rectangular prism with length l, width w, and […]
Geometry Puzzle – Challenge 75
A cube has surface area 3a and volume 2a. Find the total edge length (a cube has 12 edges). Set 6x^2 = 3a and x^3 = 2a, solve to get x = 4, and total edge length = 12 times 4 = 48 feet. Key takeaways: Cube: 6 faces (each x^2), 12 edges (each x), […]
