Two-dimensional (2D) shapes are completely flat. They have two dimensions – length and width. A polygon is a closed 2D shape with straight sides that meet at vertices. Polygons can be regular or ...

For example, to extrude a triangular prism out of a triangle, a user can touch the two-dimensional object in three places and "pull" or "lift" up, away from the screen's surface. Here, a user can ...

Shapes are everywhere. If you look around, you may be able to see circles, squares and even triangles in the furniture or the flooring. If you step outside, into a garden, park or even the grounds at ...

Compared with inorganic two-dimensional (2D) materials, such as graphene and transition metal dichalcogenides, organic 2D materials are believed to possess more interesting chemical and biological ...