Maths holiday   homework     symmetry
   Symmetry generally conveys two primary    meanings. The first is an imprecise sense of    harmonious       or    aesth...
   An equilateral triangle is regular because each of its sides has same    lengths and each of its angles measure 60°.  ...
   If pentagon is regular, naturally, its sides should have equal       length. Measure of each of its angle is 108°.A re...
LINES OF SYMMETRY Triangle    Square       Pentagon      Hexagon3 lines of   4 lines of   5 lines of    6 lines ofSymmetry...
Points to remember   Any object or shape is said to have rotational symmetry if it looks    exactly the same at least onc...
ROTATIONAL SYMMETRYWhen an object rotates, its shapes and size do not change. The rotation turns an object about a fixed p...
• Half turn means rotation by 180 °.  A quarter turn is rotation by 90 °.
WHICH LETTERS HAVROTATIONAL         SYMMETRY?                              Next slide for answer
WHICH ROAD SIGNS HAVE GOT  ROTAIONAL SYMMETRY?                            • Next slide for answer…
Oh! I lost            Order 2   Order3count…             Order2
Made by-   Samyak Jain
Symmetry
Symmetry
Upcoming SlideShare
Loading in...5
×

Symmetry

615

Published on

presentation on symmetry and rotational symmetry..

Published in: Education
0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
615
On Slideshare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
Downloads
35
Comments
0
Likes
1
Embeds 0
No embeds

No notes for slide

Symmetry

  1. 1. Maths holiday homework symmetry
  2. 2.  Symmetry generally conveys two primary meanings. The first is an imprecise sense of harmonious or aesthetically pleasing proportionality and balance; such that it reflects beauty or perfection. The second meaning is a precise and well-defined concept of balance or "patterned self-similarity" that can be demonstrated or proved according to the rules of a formal system: by geometry, through physics or otherwise.
  3. 3.  An equilateral triangle is regular because each of its sides has same lengths and each of its angles measure 60°. A square is also regular because all its sides are of equal lengths and each of its angle is a right angle (i.e.90 °). Its diagonals are seem to be perpendicular bisectors of one another.
  4. 4.  If pentagon is regular, naturally, its sides should have equal length. Measure of each of its angle is 108°.A regular hexagon has all its sides equal and each of its anglesmeasures 120°.
  5. 5. LINES OF SYMMETRY Triangle Square Pentagon Hexagon3 lines of 4 lines of 5 lines of 6 lines ofSymmetry Symmetry Symmetry Symmetry
  6. 6. Points to remember Any object or shape is said to have rotational symmetry if it looks exactly the same at least once during a complete rotation through three hundred and sixty degrees. During the rotation, the object rotates around a fixed point. Its shape and size do not change. This fixed point is called the centre of rotation. Rotation may be clockwise or anti-clockwise. A full turn refers to a rotation of three hundred and sixty degrees. A half turn refers to a rotation of one hundred and eighty degrees. A quarter turn refers to a rotation of ninety degrees. The angle at which a shape or an object looks exactly the same during rotation is called the angle of rotation. The order of rotational symmetry can be defined as the number of times that a shape appears exactly the same during a full 360orotation.
  7. 7. ROTATIONAL SYMMETRYWhen an object rotates, its shapes and size do not change. The rotation turns an object about a fixed point. This fixed point is the centre of the rotation.The angle of turning during rotation is called angle of rotation. A full turn is 360o.
  8. 8. • Half turn means rotation by 180 °. A quarter turn is rotation by 90 °.
  9. 9. WHICH LETTERS HAVROTATIONAL SYMMETRY? Next slide for answer
  10. 10. WHICH ROAD SIGNS HAVE GOT ROTAIONAL SYMMETRY? • Next slide for answer…
  11. 11. Oh! I lost Order 2 Order3count… Order2
  12. 12. Made by- Samyak Jain
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×