Summary
Symmetry involves identifying and creating figures that are the same on both sides. A shape is symmetrical if it can be folded in half and both sides match exactly.
- Symmetric Figures — A figure is symmetric if it looks the same on both sides of a line. Example: A butterfly has symmetry because its wings are identical on both sides.
- Line of Symmetry — A line that divides a figure into two identical parts. Example: A square has four lines of symmetry.
- Draw Symmetric Figures — Creating a design that is identical on both sides of a line. Example: Completing a half-drawn heart to make it symmetrical.
Exam Tips
Key Definitions to Remember
- Symmetric Figures: Figures that are the same on both sides.
- Line of Symmetry: A line that divides a figure into two identical parts.
Common Confusions
- Thinking a shape is symmetrical when it is not.
- Confusing the number of lines of symmetry in different shapes.
Typical Exam Questions
- Which shapes are symmetrical? Circle the symmetrical shapes.
- How many lines of symmetry does a square have? A square has four lines of symmetry.
- Draw a line of symmetry on this shape. Draw a line that divides the shape into two identical parts.
What Examiners Usually Test
- Ability to identify symmetric figures.
- Ability to identify and draw lines of symmetry.
- Ability to complete designs to make them symmetrical.