Three lines of symmetry on an equilateral triangle. Right-angled triangles follow the same rules as other triangles. It's not the right angle that matters but whether the triangle is scalene or ...

A quadrilateral is a 2D shape with four sides. Different types of quadrilateral have different numbers of lines of symmetry. A trapezium has one pair of parallel sides. Some trapeziums have one line ...

Symmetry is a concept that relates to balance and proportion, it’s a vital aspect of visual understanding that every student should learn about. Identifying lines of symmetry is an essential skill ...

We are fond of saying things are symmetric, but what does that really mean? Intuitively we have a sense of symmetry as a kind of mirroring. Suppose we draw a vertical line through the middle of a ...

Receive emails about upcoming NOVA programs and related content, as well as featured reporting about current events through a science lens. Symmetry also has an aesthetic meaning, although this is ...