In general usage, symmetry most often refers to mirror or reflective symmetry; that is, a line (in 2-D) or plane (in 3-D) can be drawn through an object such that the two halves are mirror images ...

Intuitively we have a sense of symmetry as a kind of mirroring. Suppose we draw a vertical line through the middle of a square. This line cuts the square into two equal parts, each of which is the ...

For example, you might hear students say ... These sketches portray a different type of line symmetry – vertical, horizontal, and oblique – with squares showing on only one side of the line of ...

Watch the video from BBC Bitesize for Teachers to see examples of a mirror line. This pattern is made of squares. The finished pattern has vertical symmetry. Some of the squares are filled in ...

That's a perfect example of reflective symmetry. I'm going to take a photograph of it. A 2D shape is symmetrical if you can draw a line through the middle of it and either side is a reflection of ...