What is reflectional symmetry and how can it be used to create a symmetrical design?

1. Design one half of your desired pattern or shape.
2. Identify the axis of symmetry, which is the line along which the design will be mirrored.
3. Reflect or mirror the designed half across this axis to create the other identical half. This completes the full, symmetrical design.

For example, to design a symmetrical butterfly, you would draw one wing and half of the body, then reflect it across a central vertical line to create the other wing and complete the body.