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Lines Of Symmetry

Problem

Show how it is possible to make each of the diagrams below have a line of reflective symmetry, by adding a single square to each diagram.


Solution

It can be done as follows:

What is the simplest shape made from unit squares with no reflective symmetry that would require two single squares to be added to make a line of reflection?

Problem ID: 38 (Mar 2001)     Difficulty: 1 Star

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