BrightPath
Find a Line of Symmetry by Folding
Name:
Date:
Today I am practising: checking reflection symmetry with matching halves
1
Draw and cut a nonsquare rectangle with adult help. Fold it so its short sides meet. Mark the fold.
2
Fold it so its long sides meet. Mark the second fold.
3
Does each fold make both halves match? Describe how you checked.
4
Try a corner-to-opposite-corner fold on the nonsquare rectangle. Do the boundaries match?
5
Repeat the diagonal fold with a square. What changes?
6
Write a rule for checking whether a fold marks a line of symmetry.
- Prepare visibly nonsquare rectangles to make the contrast clear.
- Use adult help and blunt scissors.
- Check matching boundaries instead of assuming any dividing line is symmetric.