Chapter – 14: Symmetry
Exercise 14.1 1. Copy the figures with punched holes and find the axes of symmetry for the following: (a) Solution: – A figure has a line of symmetry, if there is a line about which the figure…
Chapter – 15: Visualizing Solid Shapes
Exercise 15.1 1. Identify the nets which can be used to make cubes (cut out copies of the nets and try it): (i) Solution: – The given net cannot be folded as cube. Because, it can be…
Chapter 2: Whole Numbers
Ex-2.1 1.Write the next three natural numbers after 10999. Solution: Three natural number = 1,2,3. The next three natural number after 10999 10999 + 1 = 11000 10999 + 2 = 11001 10999+ 3 = 11002 2….
Chapter 4: Basic Geometrical Ideas
EXERCISE 4.1 1. Use the figure to name: (a) Five points (b) A line (c) Four rays (d) Five line segments Solutions: (a) The five points are D, E, O, B and C (b) A line is (c)…
Chapter 5: Understanding Elementary Shapes
Exercise-5.1 1. What is the disadvantage in comparing line segments by mere observation? Solutions: By mere observation we can’t compare the line segments with slight difference in their length. We can’t say which line segment is of…
Chapter – 7: Congruence of Triangles
Exercise 7.1 1. Complete the following statements: (a) Two-line segments are congruent if ___________. Solution: – Two line segments are congruent if they have the same length. (b) Among two congruent angles, one has a measure of…
Chapter 13: Symmetry
EXERCISE 13.1 Solution: Four examples are the blackboard, the table top, a pair of scissors, the computer disc etc. 2. For the given figure, which one is the mirror line, l 1 or l 2 ? Solution:…
Chapter 14: Practical Geometry
EXERCISE 14.1 Solution: Steps to draw the required circle with a radius of 3.2 cm are as follows. Step 1: Measure and open the compass of the given length. Step 2: Mark a Centre ‘O’ as the Centre. As we…
How to learn coding quickly?
Today it’s a dream of every child to be a coder, however learning to code requires other skills such as creativity, quick problem-solving skills, persistence, and passion for computer science, which I’m sure most of you have…
