There are Infinite number of figure , that contains at least three angles and requires three letters to name each angle
1.Any of the Triangle, either Acute, Obtuse, Right, Scalene, Isosceles, or Equilateral.
2. Any of the Quadrilateral, Parallelogram,Rectangle, Square, Trapezoid, and Kite.
→Or In General
Any of the Polygon whether it is Regular or Irregular.
→Because, A polygon is defined as ,a simple closed figure made up of three or more line segment.