MENUSymmetry Worksheet
A line cuts each picture in half. Color the squares on the other side of the line so that both halves match, as in the example. Click a square to color it and click it again to clear it. When you have colored as many squares as the picture has, a mark shows if it is right. Reload the page for new pictures.
What is symmetry?
A picture is symmetric when a line cuts it into two halves that match like a reflection in a mirror. Fold the paper along the line and the two halves land exactly on top of each other. This line is called the line of symmetry.
Example 1: a line down the middle
Every colored square has a partner on the other side of the line, in the same row and just as far from the line. The square right next to the line has its partner right next to the line. The square 2 squares from the line has its partner 2 squares from the line.
Example 2: a line from corner to corner
Fold the grid along the line in your mind: every square lands on its partner. The partner is across the line on the slanting row of squares (the dashed lines), just as far from the line.
Overlapping Pictures