We have learnt about plane shapes and solid shapes. Plane shapes have two measurements like length and breadth and therefore they are called two-dimensional shapes whereas a solid object has three measurements like length, breadth, height or depth. Hence, they are called three-dimensional shapes. Also, a solid object occupies some space.
Two-dimensional and three-dimensional figures can also be briefly named as 2-D and 3-D figures.
A 3-dimensional object can look differently from different positions so they can be drawn from different perspectives.
Perspective is very important for drawing a picture but it is not relevant for a map.
There could be various ways to map and as per the route map will be changed and also change the length as compare to routes.
See the following solids! And observe the Face, edges and Vertices.
Each of these solids is made up of polygonal regions which are called its faces; these faces meet at edges which are line segments; and the edges meet at vertices which are points. Such solids are called polyhedrons.
Convex polyhedrons: You will recall the concept of convex polygons. The idea of convex polyhedron is similar.
Regular polyhedrons: A polyhedron is said to be regular if its faces are made up of regular polygons and the same number of faces meet at each vertex.
A prism is a polyhedron whose base and top are congruent polygons and whose other faces, i.e., lateral faces are parallelograms in shape.
