Triangles

Polygon with three edges and vertices.

A triangle is a polygon with three edges and three vertices. It is one of the basic shapes in geometry, defined by any three non-collinear points connected pairwise by straight lines.

/ˈtraɪˌæŋɡəl/

The word 'triangle' comes from the Greek words ‘tri’ meaning three and ‘gonos’ meaning angle.

A triangle is a shape with three sides and three corners, like a slice of pizza or the roof of a house.

The word 'triangle' comes from the Greek words ‘tri’ (meaning three) and ‘gonos’ (meaning angle)
The Great Pyramid of Giza is made up of triangles
Triangles are used in architecture and engineering for their strength

Polygon Geometry

Equilateral triangle Isosceles triangle Scalene triangle Right triangle

Vertices Edges