Everyday Math Essentials
Cover quick calculations for percentages, fractions, averages, and ratios used in school, shopping, and spreadsheets.
⬡ Polygon Calculator
Calculate properties of regular polygons
About Regular Polygons
A regular polygon has all sides equal and all angles equal.
Properties
- Perimeter: P = n × s (n = sides, s = side length)
- Interior Angle: (n-2) × 180° / n
- Exterior Angle: 360° / n
- Area: (Perimeter × Apothem) / 2
Frequently Asked Questions
What is an apothem?
The apothem is the distance from the center to the midpoint of any side.
Sum of interior angles?
For any polygon: (n-2) × 180° where n is the number of sides.
🧭 Guided Journeys
Use a workflow instead of stopping at one result
These grouped paths are designed to help you continue with the most common follow-up calculations in this category.
Algebra & Equations
Move from powers and logarithms into more advanced solving tools when the problem gets more complex.
Geometry & Measurement
Calculate dimensions, area, and triangle relationships using a connected geometry workflow.