Lines of Symmetry (Watch Video and Do Activities)

These figures are symmetrical in relation to the dashed line. The line is called a symmetry line. What does that mean?Imagine that you folded the figure along the symmetry line. Then both sides would exactly meet. Or, if you placed a mirror along the symmetry line, you would see the other half of the figure reflected in the mirror.

Many figures are not symmetrical at all. You cannot draw a symmetry line in them.

 
1. Is the line drawn a symmetry line for the figure? You can cut out the images and fold them along the
dashed line to check.

a.	b.	c.
d.	e.

Some shapes you can fold in two different ways so that the sides meet. The cross-shape on the right has two different symmetry lines.

2. Draw as many different symmetry lines as you can into these shapes.

a.	b.
c.	d.
e.
f.