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CBSE Class 4  >  Class 4 Notes  >  Mathematics (Maths Mela: New NCERT)  >  Unit Test Solutions: Fun with Symmetry

Unit Test Solutions: Fun with Symmetry

Time: 1 hour
M.M. 20
Attempt all questions.

  • Question numbers 1 to 4 carry 1 mark each.
  • Question numbers 5 to 9 carry 2 marks each.
  • Question numbers 10 & 11 carry 3 marks each.

Q1: What is symmetry? (1 mark)
(a) A colourful pattern
(b) When both halves of a shape match like a mirror
(c) A type of measurement
(d) A line drawn outside a shape
Ans: (b) When both halves of a shape match like a mirror.

Q2: What is the line of symmetry? (1 mark)
(a) A line that decorates a picture
(b) A line that divides a shape into two mirror halves
(c) A line used for colouring
(d) A line drawn on the edge
Ans: (b) A line that divides a shape into two mirror halves.

Q3: Which of these shapes has no line of symmetry? (1 mark)
(a) Square
(b) Circle
(c) Equilateral triangle
(d) Scalene triangle
Ans: (d) Scalene triangle.

Q4: Which activity creates symmetrical patterns? (1 mark)
(a) Colouring randomly
(b) Ink design by folding paper
(c) Cutting vegetables
(d) Drawing zig-zag lines
Ans: (b) Ink design by folding paper.

Q5: Give three examples of shapes with no line of symmetry.   (2 marks) 
Ans: The three examples are:Unit Test Solutions: Fun with Symmetry

(i) Quadrilateral 
(ii) Scalene triangle 
(iii) Parallelogram

Q6: How many lines of symmetry do these have:  (2 marks)
(a) 
Unit Test Solutions: Fun with Symmetry

(b)
Unit Test Solutions: Fun with Symmetry

Ans: (a) Square has 4 lines of symmetry Unit Test Solutions: Fun with Symmetry

(b) Circle has infinite lines of symmetry.Unit Test Solutions: Fun with Symmetry

Q7: Draw Line of Symmetry for the following shapes

(a)
Unit Test Solutions: Fun with Symmetry

(b)Unit Test Solutions: Fun with Symmetry

Ans:

(a)Unit Test Solutions: Fun with Symmetry

(b)Unit Test Solutions: Fun with Symmetry

Q8: Give one symmetrical letter and one non-symmetrical letter/number. (2 marks)
Ans: Symmetrical: A, B, C...Unit Test Solutions: Fun with SymmetryNon-symmetrical: G or LUnit Test Solutions: Fun with Symmetry

Q9: In the following figures, the mirror line (i.e., the line of symmetry) is given as a dotted line. Complete each figure performing reflection in the dotted (mirror) line.  (2 marks)Unit Test Solutions: Fun with Symmetry

Ans: Unit Test Solutions: Fun with Symmetry

Q10: Write the number of lines of symmetry for: 3 types of triangle. (3 marks)
Ans: Unit Test Solutions: Fun with Symmetry

Q11: What is a mirror image? which of the following option is the correct mirror image: (3 marks)Unit Test Solutions: Fun with Symmetry
Ans: A mirror image is when one half looks exactly like the other as if seen in a mirror. A butterfly's wings are an example because both sides look the same. The correct option for mirror image is (d)

The document Unit Test Solutions: Fun with Symmetry is a part of the Class 4 Course Mathematics for Class 4 (Maths Mela: New NCERT).
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FAQs on Unit Test Solutions: Fun with Symmetry

1. What is symmetry in the context of shapes?
Ans. Symmetry in shapes refers to a situation where one part of a shape is a mirror image of another part. This can occur along a line (line symmetry) or can involve rotational symmetry where a shape looks the same after being rotated about a point.
2. How can we identify line symmetry in a shape?
Ans. To identify line symmetry in a shape, one can draw a line through the shape. If the shape can be divided into two identical halves that are mirror images of each other on either side of the line, it is said to have line symmetry.
3. What is rotational symmetry and how do we determine its order?
Ans. Rotational symmetry is a property of a shape that looks the same after a certain amount of rotation. The order of rotational symmetry is determined by how many times a shape can be rotated within a full 360-degree turn and still appear the same. For example, a square has an order of 4.
4. Can you give examples of everyday objects that exhibit symmetry?
Ans. Yes, everyday objects that exhibit symmetry include butterflies (which display bilateral symmetry), roundabout signs (which exhibit rotational symmetry), and many flowers (which often show both line and rotational symmetry).
5. Why is understanding symmetry important in mathematics?
Ans. Understanding symmetry is important in mathematics as it helps in recognising patterns, solving problems, and enhancing spatial awareness. It is also fundamental in geometry, art, and nature, contributing to a deeper understanding of shapes and their properties.
About this Document
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Apr 20, 2026 Last updated
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