Symmetry
Ages 7–11Difficulty adapts to you
Symmetry
A shape has symmetry if you can fold it along a line and both halves match perfectly. That line is called the line of symmetry.
Your goals
- ✓You can find lines of symmetry in shapes.
- ✓You can use line of symmetry, reflection correctly.
- ✓You can imagine folding along the line to see whether both halves match.
Words to know
- line of symmetry:
- A line that divides a shape into matching mirror-image halves.
- reflection:
- A mirror image across a line.
Examples
- 1A square has 4 lines of symmetry.
- 2A rectangle has 2 lines of symmetry (through the middle). A circle has infinite!
Check these
- • Do not count a diagonal or centre line that does not create matching halves.
- • Keep every number, symbol, label, and unit in its correct place.
- • Show enough working to check how you reached your answer.
Helpful habits
- • Read the whole question before choosing what to do.
- • Show one clear step at a time and check each step.
- • If you are stuck, draw a model, try smaller numbers, or revisit the example.
Now try your own
Create your own symmetry example, solve it, and explain how you checked it.
Byte
Helpful Hints“Calculators are tools, not replacements for thinking!”