Viisnurga
Viisnurga is a term used in Estonian to describe a pentagon, a five-sided polygon. Like any polygon, a viisnurga has a specific number of sides and vertices. The sum of the interior angles of a simple viisnurga is always 540 degrees. Regular viisnurga have all sides equal in length and all interior angles equal to 108 degrees. This shape is fundamental in geometry and appears in various natural and man-made structures. For instance, the shape of a starfish or the outline of a home plate in baseball are examples of pentagons. In architecture and design, pentagonal shapes are sometimes incorporated for their aesthetic appeal and structural properties. The study of viisnurga falls under the broader field of geometry, which explores the properties and relationships of points, lines, surfaces, and objects in space. Understanding the characteristics of a viisnurga is a basic step in learning more complex geometric concepts.