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Chapter 18 Symmetry Exercise 18.2

Question: 1

In the following figures, the mirror line (i.e. the line of symmetry) is given as dotted line. Complete each figure performing reflection in the dotted (mirror) line. Also, try to recall name of the complete figure.

Chapter 18 Symmetry Exercise 18.2

Solution:

(a)it will be a rectangle.

Chapter 18 Symmetry Exercise 18.2

(b) It will be a triangle.

Chapter 18 Symmetry Exercise 18.2

(c) It will be a rhombus.

Chapter 18 Symmetry Exercise 18.2

(d) It will be a circle.

Chapter 18 Symmetry Exercise 18.2

(e) It will be a pentagon.

Chapter 18 Symmetry Exercise 18.2

(f) It will be an octagon.

Chapter 18 Symmetry Exercise 18.2

 

Question: 2

Each of the following figures shows paper cuttings with punched holes. Copy these figures on a plane sheet and mark the axis of symmetry so that if the paper is folded along it, then the wholes on one side of it coincide with the holes on the other side.

Chapter 18 Symmetry Exercise 18.2

Solution:

The lines of symmetry in the given figures are as follows:

Chapter 18 Symmetry Exercise 18.2

 

Question: 3

In the following figures if the dotted lines represent the lines of symmetry, find the other hole (s).

Chapter 18 Symmetry Exercise 18.2

Solution:

The other holes in the figure are as follows:

Chapter 18 Symmetry Exercise 18.2

Chapter 18 Symmetry Exercise 18.2


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