Question 1

State the number of lines of symmetry for the following figures(a) An equilateral triangle  (b) Isosceles triangle (c) Scalene triangle(d) A square  (e) A rectangle  (f)  A rhombus (g) A parallelogram  (h) A quadrilateral  (i) A regular hexagon (j) A circle.

Accepted Answer

Question 2

Write all the capital letters of the English alphabets which have two lines of symmetry.

Accepted Answer

Letter H,I and X has two line of symmetry.

Question 3

Which of the following alphabet has horizontal line of symmetry ?

Accepted Answer

As shown in figure we have horizontal line of symmetry or figure is symmetrical above the horizontal line passing through the the $B,H,E$

Question 4

How many lines of symmetry are in this isosceles triangle?

Accepted Answer

An isosceles triangle has one line of symmetry. However, if the isosceles triangle is also an equilateral triangle, then it has three lines of symmetry.But the given triangle is not an equilateral triangle.An isosceles triangle is defined as a triangle with two sides of equal length. An equilateral triangle is defined as a triangle with three sides of equal length. Therefore, an equilateral triangle is also an isosceles triangle. This triangle has 2 sides of equal length. When an isosceles triangle has exactly two sides of equal length, then it has just 1 line of symmetry that runs from the vertex between the two sides of equal length to the midpoint of the side opposite that vertex.So option A is the correct answer.

Question 5

How many lines of symmetry are there for an equilateral triangle.

Accepted Answer

Equilateral triangle have all three sides equal and all three&#10;angles equal showing 3 lines of symmetry.

Question 6

Draw all lines of symmetry for each of the following letters:

Accepted Answer

(i)Letter 'C' has one line symmetry.(ii) Letter 'E' has one line symmetry.(iii)Letter 'F' has no line symmetry.(iv)Letter 'K' has no line symmetry.(v)Letter 'X' has two line symmetry.(vi) letter 'V' has one line symmetry.(vii)Letter 'M' has one line symmetry.(viii)Letter 'Y' has one line symmetry.

Question 7

Give three examples of shapes with no line of symmetry.

Accepted Answer

The three examples are(i) Quadrilateral (ii) Scalene triangle(iii) Parallelogram

Question 8

How many lines of symmetry does above regular pentagon have?

Accepted Answer

lines of symmetry does a regular pentagon has 5 line of symmetry  as shown in figure

Question 9

The number of capital letters of the English alphabets having both horizontal and vertical lines of symmetry are ------.

Accepted Answer

We know that in A there is only vertical symmetry and in B there is only horizontal symmetry. Only H, I, O, X have both vertical and horizontal symmetries. The number of capital letters of the English alphabets having both horizontal and vertical lines of symmetry is 4 (H, I, O, X).So,  option C is the correct answer.

Question 10

Which of the following alphabet has vertical line of symmetry?

Accepted Answer

Option A is correct because Left side of line is the mirror image of right one and vise versa.