This presentation discusses different types of symmetry. It defines symmetry as identical parts facing each other or around an axis. There are two main types of symmetry discussed - line symmetry, where a figure does not change upon reflection, and rotational symmetry, where an object looks the same after rotation. Examples are given of different geometric shapes and their number of lines of symmetry, ranging from 1 line to many lines to no lines of symmetry. Mirror images are also introduced as reflected duplications that appear identical but reversed.

1. SYMMETRY
In this PowerPoint presentation , we will explore the world of
Symmetry.

2. What is symmetry?
• The quality of being
made up of exactly
similar parts facing each
other or around an axis
is called symmetry.
• A line of symmetry
is a line that divide a
figure into two equal (
congruent) half.

3. Line Symmetry
• Reflection symmetry or
line symmetry is a
symmetry with respect
to reflection.
• That is, a figure which
does not change upon
undergoing a reflection
has reflection (line)
symmetry.

4. Rotational Symmetry
• Generally speaking, an
object with rotational
symmetry, also known
as radial symmetry, is
an object that looks the
same after a certain
amount of rotation.
• An object may have
more than one
rotational symmetry

5. Figures with 1 line of
symmetry.
• Figures like an
isosceles triangle, an
arrow ,letter ‘A’ etc.
have 1 line of
symmetry.

6. Figures with 2 lines of
symmetry.
• Figures like a
rectangle, a
basketball, the letter
‘H’ etc. have 2 lines
of symmetry .

7. Figures with 3 lines of
symmetry.
• Figures like an
equilateral triangle, a
three petaled
flower, have 3 lines
of symmetry

8. Figures with more than 3
lines of symmetry.
• Figures like circle
,square , flowers etc.
have more than 3
lines of symmetry.

9. Figures with no lines of
symmetry.
• Figures like
pallelogram , a written
notebook, map of a
country etc . have no
line of symmetry.

10. Mirror Image
• A mirror image is a
reflected duplication of
an object that appears
identical but reversed.
for e.g.:

11. Thank you!
Made by Tayeena Tabiya
,7th ‘B’ , J.V.M.