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C:\Documents And Settings\Gallery\My Documents\Atsp Office\Tanmaya\Symmetry

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A presentation on the mathematical topic SYMMETRY......can be in handy if as a homework given by ur math teacher.

A presentation on the mathematical topic SYMMETRY......can be in handy if as a homework given by ur math teacher.

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Transcript

  • 1. SYMMETRY
  • 2. What is symmetry?
    • A figure is symmetrical when there exists a line which divides it into two parts, such that if the figure is folded along that line, the two parts exactly overlap each other
    • The line which divides figure into two equal is called line of symmetry or a axis of symmetry.
    • Line segment has one line of symmetry i.e. perpendicular bisector that divides the line into two equal parts.
  • 3. SOME SYMMETRICAL SHAPES
  • 4. GEOMETRICAL FIGURES WITH ONE AXIS OF SYMMETRY
    • LINE SEGMENT: A line segment has one axis of symmetry which is the line passing through the mid point of the line segment and is perpendicular to the line segment .
    • ANGLE: An angle has only one axis of symmetry which is the line that divides the angle into two equal halves.
  • 5.
    • ISOSCELES TRIANGLE: An isosceles triangle is a triangle with two equal sides .
    • SEMICIRCLE: A semicircle has one line of symmetry which is the line passing through the mid point of the diameter and is also perpendicular to it .
  • 6. MIRROR OR REFLECTION SYMMETRY
    • When the object and its reflection are symmetrical , the mirror line is the axis of symmetry.
  • 7. PROPERTIES OF MIRROR REFLECTION
    • The length of the image remains the same as that of the object.
    • The angle also remains unchanged.
    • The image will be as far behind the mirror as the object is in front of the mirror.
  • 8. THANK U AND HAVE A GR8 DAY!