Symmetry
Maths: Year 3 & 4 National Curriculum, topic 7.1.1
Geometry Basics
Vertices and edges
- The corners of a polygon are called vertices and the sides are called edges.
Symmetry
Symmetry is all to do with how shapes look after being reflected in a mirror.
Symmetry
- Symmetry is when one side of a shape is the exact mirror image of the other side.
- A shape is symmetrical is one side of the shape is a mirror image of the other side.
Line of symmetry
- A line of symmetry of a shape is a line which divides the shapes into two halves which are mirror images of each other.
- A shape can have many lines of symmetry.
Test yourself on Symmetry
How could we describe these lines?
How could we describe these lines?
How could we describe these lines?
What angle is there between 2 perpendicular lines?
How many lines of symmetry does this shape have?