1 Marks Question

Question 11 Mark

Find the number of lines of symmetry and angles of rotational symmetry of the following figures.

Answer

Figure	Number of Lines Symmetry	Angles of Rotational Symmetry
(i)	4	$90^{\circ}, 180^{\circ}, 270^{\circ}$ and $360^{\circ}$
(ii)	3	$120^{\circ}, 240^{\circ}$ and $360^{\circ}$

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Question 21 Mark

Given the line(s) of symmetry, find the other hole(s):

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Question 31 Mark

The figure has been created by punching a single hole after folding the paper twice. How has the paper been folded?

Answer

It has been folded diagonally.

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Question 41 Mark

Complete the figure so that dotted lines are its line of symmetry.

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Question 51 Mark

What does the meaning of lateral difference in mirror reflection?

Answer

Lateral difference means the left part of the object seems to be right part of image and vice versa.

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Question 61 Mark

What name is given to a geometrical property which refers to the exact match in shape and size between two halves of an object?

Answer

Symmetry

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Question 71 Mark

Find the order of rotational symmetry for each of the following polygons:
(i) Rhombus
(ii) Regular pentagon
(iii) Regular hexagon
(iv) Regular octagon

Answer

(i) 2
(ii) 5
(iii) 6
(iv) 8

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Question 81 Mark

What is the order of rotational symmetry in a rectangle?

Answer

Two

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Question 91 Mark

How many lines of symmetry can there be in an irregular shape?

Answer

Zero