Regular Polygon Calculator
Calculate interior angles, exterior angles, area, and perimeter of regular polygons
About this calculator
This Regular Polygon Calculator helps you instantly compute all essential properties of regular polygons including interior angles, exterior angles, area, and perimeter. Perfect for students, engineers, architects, and designers working with geometric shapes, this tool eliminates manual calculations and reduces errors. Whether you're solving homework problems, designing patterns, or planning construction projects, this calculator provides accurate results for any regular polygon from triangles to complex multi-sided shapes.
How to use
Enter the number of sides of your regular polygon and the length of one side. The calculator will automatically compute and display the interior angle, exterior angle, total area, and perimeter. Results are shown instantly with precise measurements for immediate use in your projects or studies.
Frequently asked questions
What is a regular polygon?
A regular polygon is a geometric shape with equal sides and equal angles, like squares, equilateral triangles, or regular pentagons.
How do you calculate the interior angle of a regular polygon?
Use the formula: (n-2) × 180° ÷ n, where n is the number of sides of the polygon.
What's the difference between interior and exterior angles?
Interior angles are inside the polygon, while exterior angles are formed between one side and the extension of an adjacent side.