Class 7 Maths Chapter 12 Question Answers - Symmetry

Q1. State the number of lines of symmetry for the following figures.
(a) A Rhombus
(b) An Equilateral triangle
Ans:
(a) 2
(b) 3

Q2. Name two examples with no line of symmetry.
Ans: Trapezius and scalene triangle.

Q3. Give two examples for figures having line symmetry and also rotational symmetry.
Ans: Regular hexagon and equilateral triangle.

Q4. Name the quadrilateral which have both line and rotational symmetry of order more than 1.
Ans: Square, rectangle, rhombus.

Q5. Write the order of symmetry.
Ans: Rotational symmetry "Two"

Q6. Does the given figure have a line of symmetry?
(a)

(b)

Ans:
(a) Yes
(b) Yes

Q7. Draw the second half of each symmetrical shape.
(a)

(b)

Ans:
(a)

(b)
Q8.  Draw the line of symmetry for the following alphabets.
(a)

(b)

Ans:
(a)

(b)

Q9. Can we have a rotational symmetry of order more than one whose angle of rotation is
(a) 90^o
(b) 22^o
Ans:
(a) If angle of symmetry of a figure is a factor of 360^o then it will have rotational symmetry of order more than 1.
(b) 90^o is factor of 360^o but 22^o  is not.
The figure having angle of rotation 90^o  will have rotational symmetry more than 1.

Q10. List the alphabets which are having a reflection about vertical symmetry.
Ans: A, H, I, M, O, T, U, V, W, X, Y.

Q11. List the alphabets which are having a reflection about horizontal symmetry.
Ans: B, C, D, E, H, I, K, O, X.

Q12. List the alphabets having both vertical and horizontal rotational symmetry.
Ans: H, I, O, X.

Q13. Draw the line of symmetry
(a)
Ans: 

(b)
Ans:

(c)
Ans: