Symmetry
⭐ MasteredA shape is symmetrical if one half is a mirror image of the other. The dividing line is the line of symmetry.
A butterfly's wings show symmetry.
All about Symmetry
A shape has symmetry when it can be divided into two matching halves. A line of symmetry is the line that divides the shape so one half is a mirror image of the other. Butterfly wings and human faces are roughly symmetrical.
Some shapes have more than one line of symmetry. A square has four, while an irregular shape may have none. Rotational symmetry is when a shape looks the same after being turned less than a full turn.
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Real-life uses of Symmetry
- Designing logos and symbols that are balanced
- Folding paper to create paper snowflakes or cut-out patterns
- Creating mirror-image art and reflections
Frequently asked questions about Symmetry
How many lines of symmetry does a circle have?
Infinitely many. Any line through its centre divides the circle into two matching halves.
Does a rectangle have symmetry?
Yes, a rectangle has two lines of symmetry, through the middle of opposite sides.
What is rotational symmetry?
When a shape can be turned less than a full turn and still look the same. A square has rotational symmetry at 90 degrees.