# Definition:Pentagram

## Definition

A pentagram is a geometric figure formed by the line segments connecting alternate vertices of a regular pentagon:

## Also known as

In certain non-mathematical contexts, the words pentacle or pentangle are often seen for pentagram.

The word pentalpha is a $17$th century revival of another ancient Greek name for this shape, deriving from a construction from five overlapping $\Alpha$ (greek Alpha) symbols.

## Historical Note

The pentagram was known in ancient Babylonia.

It is believed to have been transported from there to ancient Greece, where it was revered by the Pythagoreans as a symbol of health.

## Linguistic Note

The word pentagram derives from the Greek πεντάγραμμον (pentagrammon), from πέντε (pente), meaning five, and γραμμή (grammē), meaning line.