The document Worksheet Question: Symmetry Notes | EduRev is a part of the Class 7 Course Mathematics (Maths) Class 7.

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**Q.1. Fill in the blanks : (i) Rotation turns an object above a fixed point. This fixed point is called ............. **

**(ii) Order of rotational symmetry of a circle is .................. (iii) Rhombus is a figure that has ............... lines of symmetry and has a rotational symmetry of order ..................... (iv) ....................... is a figure that has neither a line of symmetry non a rotational symmetry. **

**Ans. **(i) Centre of rotation

(ii) Infinite or uncountable

(iii) 2, 2

(iv) Quadrilateral

**Q.2. State whether the given statements are True or False : (i) A regular pentagon has no lines of symmetry. (ii) Mirror reflection leads to symmetry always. (iii) The number of lines of symmetry of a regular polygon is equal to the vertices of the polygon. (iv) An angle has two line symmetry. **

**Ans. **(i) False

(ii) False

(iii) Trure

(iv) False

**Q.3. Draw all the lines of symmetry for the following letters of they exist.**

**Ans. **

**Q.4. In each of the following figures write the number of lines of symmetry and order of rotational symmetry.**

**(i) (ii) (iii) (iv) **

**Ans. **(i) 1

(ii) 2, 2

(iii) 0, 1

(iv) 4, 4

**Q.5. Angle of rotation of a figure is 40°. What is the number of lines of symmetry?**

**Ans. 9**

**Q.6. What is the centre of rotation of a an equilateral triangle?**

**Ans. **Centroid

**Q.7. In the given square**

**(i) Find the number of lines of symmetry. (ii) What is the order of rotational symmetry?**

**Ans. **4, 4

**Q.8. In the given figure :**

**(i) Find the order of rotational symmetry. (ii) Find the degree measure of the anlge of rotation.**

**Ans. **4, 90°

**Q.9. Draw all lines of symmetry for each of the following figures given below :**

**(i)(ii) (iii) (iv) **

**Ans. **

(i)

**Q.10. Tell whether each figure has rotational symmetry or not.**

**(i) (ii) (iii) (iv) **

**Ans. **(i) No

(ii) Yes

(iii) No

(iv) Yes

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