In this page we have *Important Questions Class 7 Maths Chapter 14: Symmetry* . Hope you like them and do not forget to like , social share
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(i) A figure has __________ symmetry if there is a line about which the figure may be folded so that the two parts of the figure coincide.

(ii) A regular pentagon has ____________ line of symmetry.

(iii) A figure has ____________ symmetry if after a rotation through a certain angle. The figure looks exactly the same.

(iv)A __________ triangle has no lines of symmetry

(v) Each regular polygon has as many lines of symmetry as it has _____________.

(vi) The concept of line symmetry is closely related to __________ reflection. (vii)The quadrilateral that has four lines of symmetry and order-four rotational symmetry is a _______________.

(viii) The angle of rotational symmetry for letter S is ________________.

(ix) A line segment is symmetrical about its _______________________________.

(x) Rotation turns an object about a fixed point. The fixed point is called ________________.

(xi)Each of the letters H, N, S and Z has a rotational symmetry of order __________.

(xii) The line of symmetry of an isosceles triangle is its ______________________ from the vertex having the equal sides.

Solution

(i) When an object rotates, its shape changes.

(ii) if a shape possess rotational symmetry, it will surely have line of symmetry.

(iii) We can not have a rotational symmetry of order more than 1 whose angle of rotation is 23°

(iv) A pentagon which has more than one line of symmetry must be regular.

(v)A regular hexagon has six lines of symmetry.

(vi) A figure having two or more lines of symmetry has rotational symmetry of order more than 1.

(vii) The wheel of a bicycle can rotate both ways clockwise and anticlockwise.

(viii) The centre of rotation in a parallelogram is the point of intersection of its diagonals.

(ix) An equilateral triangle has six lines of symmetry

(x) Rotation turns an object about a fixed point which is known as centre of rotation.

Solution

In the word "MATHS" which of the following pairs of letters shows rotational symmetry

(a) M and T

(b) H and S

(c) A and S

(d) T and S

How many letters in the word SNAIL have line symmetry?

(a) 2

(b) 3

(c) 4

(d) 1

Order of rotational symmetry of

(a) 6

(b) 4

(c) 8

(d) 2

Which of the following letters of English alphabets have more than 2 lines of symmetry?

(a) Z

(b) O

(c) C

(d) H

Which of the following figures do not have line symmetry?

Which of the following figures do not have rotational symmetry?

Solution3-8

Match order of rotational symmetry of these shapes:

Solution

Class 7 Maths Class 7 Science