Geometry

# Where did the polygon name for triangle come from?

###### Wiki User

###### 2008-09-10 22:53:39

The name of a triangle came from the number of angles it has,

'tri' meaning three.

## Related Questions

###### Asked in Geometry

### Is a triangle a regular polygon?

A triangle may or may not be a regular polygon. Let's look into
things.
First, a triangle is a polygon. All triangles are
polygons. To be a regular polygon, the polygon must have equal
sides. If the triangle has sides of equal length, then that
triangle is an equilateral triangle and a regular polygon. If the
triangle doesn't have sides of equal length, then it isn't a
regular polygon. But in any case, the triangle is a polygon.

###### Asked in Geometry

### Is a triangle a polygon explain why or why not?

Starting with the definition of polygon makes much easier to
understand why triangle is a polygon.
Definition: A polygon is a closed figure bounded by
sides.
Definition of triangle: Triangle is a closed figure bounded by
three sides.
Since triangle is also a closed figure bounded by sides
therefore, triangle is a polygon.