Symmetry in the man-made world. Diane Louise Jordan has three sessions on observing shapes in the world around us. BBC School ...

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 of ...

We've looked at reversal patterns (head and shoulders pattern and inverse head and shoulders pattern). In this lesson, we cover continuation patterns, specifically the symmetrical triangle pattern.