what are lines of symmetry
If you can move an entire design in one of these ways, and that design appears unchanged, then the design is symmetric. If you can reflect (or flip) a figure over a line and the figure appears unchanged, then the figure has reflection symmetry or line symmetry. The line that you reflect over is called the line of symmetry. A line of symmetry divides a figure into two mirror-image halves. The dashed lines below are lines of symmetry: The dashed lines below are not lines of symmetry. Though they do cut the figures in half, they don't create mirror-image halves. You can use a Mira (image reflector) or simply the process of cutting and folding to find lines of symmetry.