CAMBRIDGE, MA — In computer graphics and computer-aided design (CAD), 3D objects are often represented by the contours of their outer surfaces. Computers store these shapes as “thin shells,” which ...

For similar 2D and 3D shapes, there is a relationship between the length scale factor and the area, surface area or volume of the enlarged shapes. Areas increase by a factor equivalent to the length ...

This cuboid contains 12 small cubes. Each small cube has a volume of 1 cm 3. The volume of the cuboid is 12 cm 3. The surface area of a 3D shape is the total area of all the faces. A cube has six ...