Visualising solid shapes

this is a presentation on shapes and map and is also about the map which is drawn in maths in chapter of solid shapes.

1. Visualising solid shapes

2. Content

3. Different shapes

4. 3 D Shapes Three-dimensional shapes have four properties that set them apart from two-dimensional shapes: faces, vertices, edges and volume . These properties not only allow to determine whether the shape is two- or three-dimensional, but also which three-dimensional shape it is.

5. Face The part of the shape that is flat or curved. E.g. : Cube has six faces

6. Edge The part of the shape where two faces meet. E.g. : Cube has twelve edges

7. Vertex The part of the shape where three or four edges meet E.g. : Pyramid has four edges

8. View Top view Front view Side view

9. Mapping A map is a scaled graphic representation of a portion of the earth's surface. The scale of the map permits the user to convert distance on the map to distance on the ground or vice versa. The ability to determine distance on a map, as well as on the earth's surface, is an important factor in planning and executing military missions.

10. Distances Shown on the map are proportional to the actual distance on the ground. While drawing a map, we should take care about: How much of actual distance is denoted by : 1mm or 1cm in the map It can be : 1cm = 1 Kilometres or 10 Km or 100Km etc. This scale can vary from map to map but not within the map.

11. Convex polyhedron A polyhedron is said to be convex if its surface (comprising its faces, edges and vertices) does not intersect itself and the line segment joining any two points of the polyhedron  is contained in the interior or surface.

12. Concave polyhedron A polyhedron is said to be  concave  if its surface (comprising its faces, edges and vertices) intersect itself and the line segment joining any two points of the polyhedron is contained in the interior or surface.

13. Regular polyhedron 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