Symmetry around us

A shop sign has big letters. The letter A folds along an up-down line through its middle. The letter B does not.

Four groups of letters

Try a line up and down through a capital letter's middle. Then try a line across.

A, M: up-down only. B, E: across only. H, X: both. F, N: neither.

Figure 1 — four letters, four answers. Every dashed line here really is a fold line for that letter.

A jaali is a stone screen with a repeating pattern. Many jaali designs have fold lines.

A mango leaf has a thick middle line, the rib. Its two sides look alike. The match is close, but not exact.

In the lab, pick a line. Slide Fold to 100%. Do the halves match?

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