Symmetry

Q.

Which of the letters have both horizontal and vertical line of symmetry?

1. $H$

2. $E$

3. $O$

4. $X$

Q. Which of the following images is/are tessellation(s)?

Pattern A
Pattern B
Pattern C
Pattern D

1. Only pattern B is a tessellation.
2. Only pattern B and C are tessellations.
3. Only pattern A, B and C are tessellations.
4. All of the patterns are tessellations.

Q. elements of symmetry

Q. Two objects are symmetrical if they are of same shape and and one object has different from the other.

1. length
2. breadth
3. orientation
4. size
5. motion

Q.

(a) After rotating through an angle of 120 degrees through its centre of symmetry the figure looks exactly the same as its original. At what other angles will it happen for the figure? Describe with an example.

(b) What is the order of rotational symmetry?

(c) What is the order of rotational symmetry of a semi-circle?
[4 MARKS]

Q. What is the basic shape of the tessellation used in the following figure?

1. 
2. 
3. 
4. 

Q.

Any figure with two different lines of symmetry will have point symmetry

1. True

2. False

Q.

There was one mirror in which Tom saw himself and started smiling. Jerry asked him "Why are you smiling so much?”. He replied that even our face has line of symmetry. How many lines of symmetry are possible for Tom's face, as shown below?

1. 1
2. 2
3. 3
4. 4

Q. Concentric circles have

1. common centre and different radii.
2. different centre and same radii.
3. common centre and same radii.
4. different centre and different radii.

Q.

How many lines of symmetry are there in a circle?

1. Infinite

2. $1$

3. $2$

4. Depends upon radius of the circle

Q. What is the order of symmetry for the regular triangle?

1. 0
2. 2
3. 4
4. 3

Q.

After entering a house in the magic world, Tom and Jerry found one chocolate bar which was in the shape of an alphabet. As we all know that Tom and Jerry can never stop fighting and this time they started fighting for chocolate. But one good thing happened to them is that Tom identified the line of symmetry of that chocolate so that they could divide it among themselves. Can you identify the shape of that chocolate from the given options?

1. N
2. H
3. J
4. G

Q. __________ are patterns formed by arranging congruent figures side by side in all the directions without gaps.

1. Dilations
2. Tessellations
3. Simulations
4. Constellations

Q.

There are different kinds of symmetry. One of them is bilateral symmetry. Which of the following figures exhibit bilateral symmetry?

1. 1

2. 2

3. 3

4. 4

Q.

Tom and Jerry are in front of a magical world. The door of the magical world has the following design.

Find the number of lines of symmetry in the given design.

1. 3

2. 4

3. 1

4. 2

Q.

The letter, ${}^{\prime }{A}^{\prime }$, after reflection along y-axis becomes

1. $W$

2. $A$

3. $V$

4. $X$

Q.

Flowers have symmetry. In the same way there are so many things, where you can observe concept of mathematics.Write the application of mathematics in nature .

Q. A right triangle ABC with sides 5 cm, 12 cm and 13 cm is revolved about the side 12 cm. Find the volume of the solid so obtained.

Q. Letter has symmetry.

1. no
2. Horizontal &Vertical
3. Horizontal
4. Vertical

Q. What is the proof for Heron's formula?

Q.

Given the line of symmetry, find the other holes.

1. 

2. 

3. 

4. 

Q. Question 2 (d)
Given the lines(s) of symmetry, find the other hole(s):
d)