Question 12 Marks
How many lines of symmetry does a rhombus have?
Answer
View full question & answer→A rhombus has two lines of symmetry which are its diagonal. 
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Question 22 Marks
How many lines of symmetry does an equilateral triangle have?
Answer
View full question & answer→The number of positions a figure can be rotated to, without bringing in any changes to the way it looked originally, is called its order ofrational symmetry.So, the order of rotational symmetry of an equilateral triangle is $3.$
Question 32 Marks
Give an example of a geometrical figure which has neither a line of symmetry nor a rotational symmetry.
Answer
View full question & answer→A scalene triangle has neither any line of symmetry nor a rotational symmetry. 
Question 42 Marks
What is the order of rotational symmetry of a rhombus?
Answer
View full question & answer→Order of rotational symmetry of a rhombus is not possible. Therefore ithas no rotational symmetry.
Question 52 Marks
Give an example of a figure that has a line of symmetry but does not have rotational symmetry.
Answer
View full question & answer→ The figure which has only on line of symmetry but no rotational symmetry order is an isosceles triangle. 
Question 62 Marks
Does every trapezium have a line of symmetry?
Answer
View full question & answer→ No, only isosceles trapezium has a line of symmetry but not every trapezium.
Question 72 Marks
How many lines of symmetry does an equilateral triangle have?
Answer
View full question & answer→An equilateral triangle has $3$ lines of symmetry.
Question 82 Marks
Find:
$i.$ The number of lines of symmetry.
$ii.$ The order of rotational symmetry of the adjoining figure. Draw the line of symmetry.
$i.$ The number of lines of symmetry.
$ii.$ The order of rotational symmetry of the adjoining figure. Draw the line of symmetry.
Answer
View full question & answer→In the given figure, the line of symmetry has been drawn which is one. There is no rotational symmetry of this figure.
Question 92 Marks
What is the line of symmetry of a semicircle? Does it have rotational symmetry?
Answer
View full question & answer→ The line of symmetry of a semicircle is the perpendicular bisector of the diameter No, it has not any rotational symmetry.
Question 102 Marks
$i.$ How many lines of symmetry does the given figure have? Draw these lines.
$ii.$ What is the order of rotational symmetry of the given figure?
$ii.$ What is the order of rotational symmetry of the given figure?
Answer
View full question & answer→$i.$ The given figure has two lines of symmetry which has been drawn.
$ii.$ It has three orders of the rotational symmetry which are $90^\circ , 270^\circ $ and $360^\circ .$
$ii.$ It has three orders of the rotational symmetry which are $90^\circ , 270^\circ $ and $360^\circ .$
Question 112 Marks
Give an example of a letter of the English Alphabet which has:
$i.$ No line of symmetry.
$ii.$ Rotational symmetry of order $2.$
$i.$ No line of symmetry.
$ii.$ Rotational symmetry of order $2.$
Answer
View full question & answer→There is one letter of the English Alphabet $Z$ which has no line of symmetry but it has order two of rotational symmetry of $180^\circ $ and $360^\circ .$
Question 122 Marks
Write three letters of the English Alphabet which has two lines of symmetry and rotational symmetry of order $2.$
Answer
View full question & answer→Three letters of the English Alphabet which have two lines of symmetry and rotational symmetry of order $2$ are $H, O$ and $X.$ 