RD Sharma Solutions for Class 8 Chapter 19 Visualising Shapes- In this chapter, we will discuss the visualisation of 3D shapes from their plane figures. Three-dimensional objects or solids generally have length, breadth and height. Three-dimensional objects look different from different locations or angles. A polyhedron is a solid shape bounded by polygons whereas non-polyhedrons do not have polygon-shaped faces. We will also learn about the representation of three-dimensional shapes. Topics mainly include polyhedra, prisms and pyramids, platonic solids, visualisation of 3-D shapes through nets.