# RS Aggarwal Class 6 Solutions Chapter 20 - Two Dimensional Reflection Symmetry

## RS Aggarwal Class 6 Chapter 20 - Two Dimensional Reflection Symmetry Solutions Free PDF

RS Aggarwal class 6 solutions chapter 20 two-dimensional reflection symmetry provided here. Solve RS Aggarwal questions to understand the concepts of two-dimensional reflection symmetry. In RS Aggarwal the chapter is explained in such a way that students can understand the concepts in a easy and better way.

## Exercise 20

Mark against the correct answer in each of Question 1 to Question 8.

Question 1:

A square has

(a) one line of symmetry

(b) two lines of symmetry

(c) three lines of symmetry

(d) four lines of symmetry

Solution:

(d) four lines of symmetry

Question 2:

(a) each one of its sides

(b) each one of its diagonals

(c) a line joining the midpoints of its opposite sides

(d) none of these

Solution:

(c) a line joining the midpoints of its opposite sides

Question 3:

(a) the line joining the midpoints of its opposite sides

(b) each of its diagonals

(c) perpendicular bisector of each of its sides

(d) none of these

Solution:

(b) each of its diagonals

Question 4:

A circle has

(a) no line symmetry

(b) one line of symmetry

(c) two lines of symmetry

(d) an unlimited number of lines of symmetry

Solution:

(d) an unlimited number of lines of symmetry

This is because a circle has infinite number of diameters. Also, a circle is symmetrical about each of its diameter.

Question 5:

A scalene triangle has

(a) no line of symmetry

(b) one line of symmetry

(c) two lines of symmetry

(d) three lines of symmetry

Solution:

(a) no line of symmetry

Question 6:

ABCD is a kite in which AB = AD and BC = DC.

(a) the diagonal AC

(b) the diagonal BD

(c) none of these

Solution:

(a) the diagonal AC

Question 7:

The letter O of the English alphabet has

(a) no line of symmetry

(b) one line of symmetry

(c) two lines of symmetry

(d) none of these

Solution:

(c) two lines of symmetry

Question 8:

The letter Z of the English alphabet has

(a) no line of symmetry

(b) one line of symmetry

(c) two lines of symmetry

(d) none of these

Solution:

(a) no line of symmetry

Question 9:

Draw the line (or lines) of symmetry of each of the following figures.

Solution:

Question 10:

Which of the following statements are true and which are false?

(i) A parallelogram has no line of symmetry.

(ii) An angle with equal arms has its bisector as the line of symmetry.

(iii) An equilateral triangle has three lines of symmetry.

(iv) A rhombus has four lines of symmetry.

(v) A square has four lines of symmetry.

(vi) A rectangle has two lines of symmetry.

(vii) Each one of the letters H, I, O, X of the English alphabet has two lines of symmetry.

Solution:

(i) True

(ii) True

(iii) True

An equilateral triangle is symmetrical about each one of the bisectors of its interior angle. Also, it has three bisectors.

(iv) False

A rhombus has two lines of symmetry. It is symmetrical about each one of its diagonals.

(v) True

A square is symmetrical about each one of its diagonal and the lines joining the midpoints of the opposite sides.

(vi) True

A rectangle is symmetrical about the lines joining the midpoints of the opposite sides.

(vii) True

#### Practise This Question

Which one of the following angles can not be constructed using compass and ruler?