ML Aggarwal Solutions for Class 8 Maths Chapter 17 Visualising Solid Shapes

A three-dimensional object or shape can look differently from different positions (or sides), so they can be drawn from different perspectives, this is called visualising a solid shape—for example, views of a hut and a solid with three cubes from different sides. A cube, rectangular prism, sphere, cone and cylinder are the basic 3-dimensional shapes we see around us. When we see any 3D shape from one side, then some of its parts are not visible to us. But then also we can assume that which shape it is, this is called Visualization. A picture is a detailed representation of the reality, whereas a map shows the location of an object or a place with other objects and places. A two-dimensional shape has length and width. A three-dimensional solid shape also has depth. Three-dimensional shapes, by their nature, have an inside and an outside, separated by a surface. All physical items, things you can touch, are three-dimensional. Also, a solid object occupies some space. Three-dimensional shapes have four properties that set them apart from two-dimensional shapes: faces, vertices, edges and volume. These properties not only allow you to determine whether the shape is two or three-dimensional but also which three-dimensional shape it is.