Worksheet Question: Symmetry Notes | EduRev

Mathematics (Maths) Class 7

Class 7 : Worksheet Question: Symmetry Notes | EduRev

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.

Worksheet Question: Symmetry Notes | EduRevWorksheet Question: Symmetry Notes | EduRevWorksheet Question: Symmetry Notes | EduRevWorksheet Question: Symmetry Notes | EduRev

Ans. Worksheet Question: Symmetry Notes | EduRevWorksheet Question: Symmetry Notes | EduRevWorksheet Question: Symmetry Notes | EduRevWorksheet Question: Symmetry Notes | EduRev

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

(i) Worksheet Question: Symmetry Notes | EduRev(ii) Worksheet Question: Symmetry Notes | EduRev(iii) Worksheet Question: Symmetry Notes | EduRev(iv) Worksheet Question: Symmetry Notes | EduRev

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

Worksheet Question: Symmetry Notes | EduRev

(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 :

Worksheet Question: Symmetry Notes | EduRev

(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)Worksheet Question: Symmetry Notes | EduRev(ii)  Worksheet Question: Symmetry Notes | EduRev(iii) Worksheet Question: Symmetry Notes | EduRev(iv) Worksheet Question: Symmetry Notes | EduRev

Ans. 

(i)

Worksheet Question: Symmetry Notes | EduRev

Worksheet Question: Symmetry Notes | EduRev

Worksheet Question: Symmetry Notes | EduRev

Worksheet Question: Symmetry Notes | EduRev

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

(i) Worksheet Question: Symmetry Notes | EduRev (ii) Worksheet Question: Symmetry Notes | EduRev (iii) Worksheet Question: Symmetry Notes | EduRev (iv) Worksheet Question: Symmetry Notes | EduRev

Ans. (i) No

(ii) Yes

(iii) No

(iv) Yes

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