So far we have worked with common two-dimensional figures such as the square or the triangle. Three-dimensional figures are those that extend into the third dimension, meaning that in addition to length and width, they also have height (that is, the figure has depth).

What differences do three-dimensional figures have?

Three-dimensional figures have several definitions that we will see next: Below is a three-dimensional figure that we will use to learn each definition - The cube:

Face: it is the flat side of a three-dimensional figure In the cube we have here, there are 6 faces (one of them is painted gray) Edge: these are the lines that connect one face to another in a three-dimensional figure In the cube we have here, there are 12 edges (painted green) Vertex: it is the point that connects the edges In the cube we have here, there are 8 vertices (painted orange)

Volume: it is the amount of space contained within a three-dimensional figure. The units of measurement are $cm^3$ .