Which capital letters have just one line of symmetry? Which capital letters have a rotational symmetry of order 2 ? Fill in the following table: Alphabet letters Line Symmetry Number of lines of symmetry Rotational symmetry Order of rotational symmetry Z No 0 Yes 2 S H Yes Yes O Yes Yes E Yes N Yes C

The rotational symmetry of a shape explains that when an object is rotated on its own axis, the shape of the object looks the same. Many geometrical shapes appear to be symmetrical when they are rotated 180 degrees or with some angles, clockwise or anticlockwise. Order of rotation of a figure is the number of the exact replicas of the figure we would get if we rotate the figure over a course of 360 degree. The line of symmetry is the line which passes through the centre of the object or any shape. It is considered as the axis or imaginary line of the object. In geometry, you must have learned well about the term symmetry which is defined as a balanced and a proportionate similarity found in two halves of an object, that is, one-half is the mirror image of the other half. Alphabet letters Line Symmetry Number of lines of symmetry Rotational symmetry Order of rotational symmetry Z No 0 Yes 2 S No 0 Yes 2 H Yes 2 Yes 2 O Yes infinite Yes infinite E Yes 1 No 0 N No 0 Yes 2 C Yes 1 No 0

E M B I B E

MATHEMATICS A TEXTBOOK FOR CLASS 7>Chapter 14 - Symmetry>TRY THESE>Q 2

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IMPORTANT

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Which of the following shapes have rotational symmetry about the marked point.

Important Questions on Symmetry

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IMPORTANT

MATHEMATICS A TEXTBOOK FOR CLASS 7>Chapter 14 - Symmetry>TRY THESE>Q (i)

Give the order of the rotational symmetry of the given figure about the point marked $\times$

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MATHEMATICS A TEXTBOOK FOR CLASS 7>Chapter 14 - Symmetry>TRY THESE>Q (iii)

Give the order of the rotational symmetry of the given figure about the point marked $\times$

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MATHEMATICS A TEXTBOOK FOR CLASS 7>Chapter 14 - Symmetry>Exercise 14.2>Q 1

Does the following figure have rotational symmetry of order more than $1$ ?

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MATHEMATICS A TEXTBOOK FOR CLASS 7>Chapter 14 - Symmetry>Exercise 14.2>Q 2

Give the order of rotational symmetry for the figure:

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IMPORTANT

MATHEMATICS A TEXTBOOK FOR CLASS 7>Chapter 14 - Symmetry>DO THIS

Which capital letters have just one line of symmetry? Which capital letters have a rotational symmetry of order $2$ ? Fill in the following table:

Alphabet letters	Line Symmetry	Number of lines of symmetry	Rotational symmetry	Order of rotational symmetry
$Z$	No	$0$	Yes	$2$
$S$
$H$	Yes		Yes
$O$	Yes		Yes
$E$	Yes
$N$			Yes
$C$