Line Symmetry.

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Presentation transcript:

Line Symmetry

Line Symmetry If a shape can be folded in half so that one half fits exactly on top of the other, then we say that the shape has got line symmetry. The fold is called a line of symmetry. This shape has got a vertical line of symmetry.

Line Symmetry in the Alphabet Which letters have got lines of symmetry? Click to see the lines of symmetry. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Lines of Symmetry all around us Which of these road signs have got lines of symmetry? Click to see the lines of symmetry.

Line Symmetry with Pentominoes If you don’t know what a pentomino is, then click here. If you have done the pentominoes activity before, then you will know what a pentomino is and how many different pentominoes there are. Here they are ...

Line Symmetry with Pentominoes How many lines of symmetry does each Pentomino have? Sort them according to their lines of symmetry.

Line Symmetry with Pentominoes One Line of Symmetry Two Lines of Symmetry Four Lines of Symmetry Click to start sorting

Line Symmetry with 7-Pin Polygons If you don’t know what a 7-pin polygon is, then click here. If you have done the 7-pin polygons activity before, then you will know what a 7-pin polygon is and how many different ones there are. Here they are ...

Line Symmetry with 7-Pin Polygons How many lines of symmetry does each 7-Pin Polygon have? Sort them according to their lines of symmetry.

Line Symmetry with 7-Pin Polygons One Line of Symmetry Two Lines of Symmetry Three Lines of Symmetry Six Lines of Symmetry Click to start sorting

Now you know all about line symmetry! END OF PRESENTATION

Pentominoes A pentomino is made out of five squares that are connected along at least one edge. Here is an example of a pentomino. These are NOT pentominoes. How many different pentominoes can you find? Click here to return to line symmetry.

7-Pin Polygons Here is an arrangement of 7 pins. A 7-pin polygon is a closed shape with straight sides with corners on the pins. Here are some examples of 7-pin polygons. How many different 7-pin polygons can you find? Click here to return to line symmetry.

END OF PRESENTATION