Lots of buildings and everyday objects use symmetry because it looks appealing to the human eye. Watch the video below from BBC Bitesize KS2 Maths which shows the lines of symmetry on a square ...

A shape has a line of symmetry when the folded part sits perfectly on top with all edges matching. The number of lines of symmetry in a regular polygon is equal to the number of sides. A shape has ...

In particular, he developed algebraic tools to solve tough problems such as differential equations, and he greatly extended the scope of the mathematical theory of symmetry known as representation ...