RS Aggarwal Solutions for Class 8 Maths Chapter 19 Exercise 19.2: Here we have the RS Aggarwal Solutions for Class 8 Maths Chapter 19 Exercise 19.2 on Three Dimensional Figures. This exercise helps students understand how to work with three-dimensional shapes, such as cubes, cuboids, spheres, and cylinders.
It focuses on finding the surface area and volume of these shapes. The solutions guide students through each problem with simple, step-by-step instructions, making it easier to learn and solve similar questions. By using these solutions students can get better at calculating and understanding three-dimensional figures.RS Aggarwal Solutions for Class 8 Maths Chapter 19 Exercise 19.2 PDF
(Question 1) Define Euler’s relation between the number of faces, number of edges and number of vertices for various 3-dimensional figures.
Solution:
In a 3-dimensional figure, let the number of faces be F; the number of edges be E and the number of vertices be V. Then, the Euler’s relation is given by(Question 2) How many edges are there in a
(i) Cuboid = 12 edges (ii) Tetrahedron = 6 edges (iii) Triangular prism = 9 edges (iv) Square pyramid = 8 edges(Question 3) How many faces are there in a
(i) Cube = 6 faces (ii) Pentagonal prism = 7 faces (iii) Tetrahedron = 4 faces (iv) Pentagonal pyramid = 6 faces(Question 4) How many vertices are there in a
(i) Cuboid = 8 vertices (ii) Tetrahedron = 4 vertices (iii) A triangular prism = 10 vertices (iv) A square pyramid = 5 vertices