what is the size of the angles of an equilateral triangle
Equilateral triangle In geometry, an equilateral triangle is a triangle in which all three sides are equal. In the familiar Euclidean geometry, equilateral triangles are also equiangular; that is, all three internal angles are also congruent to each other and are each 60Â°. They are regular polygons, and can therefore also be referred to as regular triangles.