The order of rotational symmetry of an equilateral triangle is:

An equilateral triangle is a triangle in which all three sides are of equal length. Each angle in an equilateral triangle measures 60 degrees. This type of triangle is symmetrical and all its properties such as area and perimeter calculations involve the same side length throughout.

In Class 6 Maths Chapter 9 on Symmetry students learn about lines of symmetry which divide a shape into two identical parts. The chapter explores different types of symmetrical shapes such as regular polygons and figures with multiple lines of symmetry. Students also practice identifying symmetry in everyday objects and drawing symmetrical shapes.