Andrea Engele laughs to herself at her bad drawing, depicting "out-of-control nose hair." In her day job, she's a graphic designer, but for the past two hours, she's thrown her professional training ...

The net of a 3D shape is what a shape looks like when opened into a 2D shape. The net can help to show the areas of each face that make up the surface area of a shape. The same units are needed for ...