In Text Questions Try These (Text Book Page No. 72,73,74,77,78,80) - Chapter 4 - Geometry - Term 3 - 7th Maths Guide Samacheer Kalvi Solutions

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Text Questions
Exercise 4.1
Try These (Text book Page No. 72)
Question I.
Can you draw a shape which has no line of symmetry?
Solution:
Yes

Question $2 .$
Draw all possible line of symmetry for the following shapes.
Solution:

Think (Text book Page No. 73)

Question $1 .$
What can you say about the number of lines of symmetry of a circle?
Solution:
A circle has infinite number of lines of symmetry.

Try These (Text book Page No. 73)
Question $1 .$
Reflect the words CHEEK, BIKE, BOX with horizontal line.
Solution:

Question $2 .$
Reflect the following words with vertical line.

Solution:

Think (Textbook Page no.73)
Question 1.
Will the figure be symmetric about both the diagonals?
Solution:
Yes, it is symmetric about both the diagonals.

Try These (Text book Page No. 74)
Question 1.
Find the order of rotational symmetry of the following figures.

Solution:
Order of symmetry : 6
Order of symmetry : 3
 

Question 2.
Find the order of rotational symmetry for an equilateral triangle.
Solution:
For an equilateral triangle order of rotational symmetry is 3 .

Think (Text book Page No. 74)

Question $1 .$
Can a parallelogram have a rotational symmetry?
Solution:

Try These (Text book Page No. 75)
Question 1.
Using translational symmetry make new pattern with the given figure.

Solution:

Try These (Text book Page No. 77)
Question 1.
Translate this figure to $4 \rightarrow 3 \uparrow$

Question $2 .$
Translate this figure to $2 \downarrow 1 \leftarrow$

Question $3 .$
How is the pre-image A translated to image $A^{\prime}$ in each of the following figures?

Think (Text book Page No. 78)
Question 1.
The pre-image and the image after a translation coincide. What can you say about the translation Solution:
There is no right, left, up or down movement took place.
 

Try These (Text book Page No. 80)
Question $1 .$
Draw the line reflection in the following pictures.

Question $2 .$
Reflect the shape with given line of reflection.