How many lines of symmetry does a regular decagon have?

A regular decagon is a polygon with ten equal sides

Answer: A regular decagon has 10 lines of symmetry

Let's look into the lines of symmetry of a decagon

Explanation:

The lines of symmetry can be drawn through the vertex and midpoints of each edge.

A regular polygon of n sides has n lines of symmetry. A decagon has 10 sides

So, it has 10 lines of symmetry in total. 

Hence, A regular decagon has 10 lines of symmetry