Chapter 13 | Symmetry | Class-7 DAV Secondary Mathematics

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Chapter 13 Worksheet 2 | Symmetry | Class-7 DAV Secondary Mathematics

Unit 13 Worksheet 2 || Symmetry

1. Find the line of symmetry of any three line segments on different sheets of paper.

Answer 1.

Chapter 13 | Symmetry | Class-7 DAV Secondary Mathematics

2. Check If the dotted lines are the line of symmetry of the given line segments.

Chapter 13 | Symmetry | Class-7 DAV Secondary Mathematics

Answer 2:

Chapter 13 | Symmetry | Class-7 DAV Secondary Mathematics

3. Lines I and m are the lines of symmetry of the line segments XY and YZ respectively. If XA = 4 cm and YZ = 6 cm, find AY, YB, XZ.

Chapter 13 | Symmetry | Class-7 DAV Secondary Mathematics

Answer 3:

Chapter 13 | Symmetry | Class-7 DAV Secondary Mathematics

4. Find the line of symmetry of the following angles on different sheets of paper.

(a) 60° (b) 150° (C) 45°

Answer 4:

Chapter 13 | Symmetry | Class-7 DAV Secondary Mathematics
Chapter 13 | Symmetry | Class-7 DAV Secondary Mathematics

5. If dotted lines represent the lines of symmetry of the given angles, find x in each.

Chapter 13 | Symmetry | Class-7 DAV Secondary Mathematics

Answer 5:

Chapter 13 | Symmetry | Class-7 DAV Secondary Mathematics

6. The dotted line represents the line of symmetry of the Isosceles &ABC, where AB = AC. If LABC = 40° and OB = 4.5 cm, find—

(a) angle BAO (b) Measure of OC. Give reasons.

Answer 6:

Chapter 13 | Symmetry | Class-7 DAV Secondary Mathematics

7. Construct an equilateral triangle ABC. Find all its lines of symmetry.

Answer 7:

Chapter 13 | Symmetry | Class-7 DAV Secondary Mathematics

8. will a scalene triangle have any line of symmetry?

Answer 8: No, the Scalene triangle has no line of symmetry.

9. Under what circumstances will a right angled triangle have a line of symmetry? Give reasons.

Answer 9:

Chapter 13 | Symmetry | Class-7 DAV Secondary Mathematics

10. Can a right angled triangle have more than one line of symmetry under any circumstances?

Answer 10:

Chapter 13 | Symmetry | Class-7 DAV Secondary Mathematics

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