Have you ever looked closely at a butterfly's wings? If you have then you have seen an example of symmetry. Symmetry is when two parts match exactly along a folded line.

The folded line in an object is called the line of symmetry.

Look at these pictures and see if you can find a line of symmetry in them. Click on Yes or No.

Let’s do some more practice on identifying lines of symmetry. This time practice using shapes. On the next screen type in yes or no if the line is a line of symmetry.

Which are Symmetrical?

Yes:  No:
Yes:  No:
Yes:  No:

Sometimes objects can have more than one line of symmetry in them. This means they can be folded more than one way and still match exactly.

Lines of Symmetry

Look at these everyday shapes and tell how many lines of symmetry each one has.

Now let’s do some more practice on identifying how many lines of symmetry different letters of the alphabet have. Go to the next screen and type in the number of lines of symmetry you find in these letters.

Now that you know about symmetry and lines of symmetry get a piece of paper and fold it in half. Draw this shape on it. After you have drawn this shape, cut it out. Open it up and make a design on it that has symmetry.