Regular Polygon Perimeter Calculator
Find a regular polygon perimeter as side count × side length.
Open toolPolygon Interior Angle Calculator
Find one interior angle of a regular polygon in degrees. A regular, simple, convex polygon with equal angles.
Free to useNo sign-upRuns in your browser
Enter your details
Enter the inputs, then select Calculate.
Your result
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Result will appear here
How Polygon Interior Angle Calculator works
Find one interior angle of a regular polygon in degrees.
A regular, simple, convex polygon with equal angles. No arbitrary vertex coordinates. Finite real inputs; output uses up to 12 significant digits. Floating-point results may be rounded.
How to use Polygon Interior Angle Calculator
Follow the labelled inputs.
Enter number of sides
Replace the example with number of sides. The field labels specify the expected format and units.
Input and settings
Check the remaining inputs
This tool uses one input. Check the supported range before running it. A regular, simple, convex polygon with equal angles.
Tool result
Run, review and save
Select Calculate. Review the calculated result, then copy it or download the result text.
Review the details
Examples and uses for Polygon Interior Angle Calculator
Check the supplied example
The starting example produces 120°. Find one interior angle of a regular polygon in degrees.
Use your own inputs
Read the labels for number of sides. A regular, simple, convex polygon with equal angles.
Record a reviewed result
Copy the calculated result into your notes. Keep the formula and assumptions with it if someone else needs to reproduce the calculation.
How to read the result
Read the units and assumptions with the output.
Find one interior angle of a regular polygon in degrees.
A regular, simple, convex polygon with equal angles. No arbitrary vertex coordinates. Finite real inputs; output uses up to 12 significant digits. Floating-point results may be rounded.
Supported input and limits
Check the stated scope before you run it.
A regular, simple, convex polygon with equal angles. No arbitrary vertex coordinates. Finite real inputs; output uses up to 12 significant digits. Floating-point results may be rounded.
The input stays in this browser. Copy result and Download save the same displayed text.
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Open toolPolygon Interior Angle Calculator: common questions
Answers about using Polygon Interior Angle Calculator and understanding its results.
What assumptions and input limits apply?
A regular, simple, convex polygon with equal angles. No arbitrary vertex coordinates. Finite real inputs; output uses up to 12 significant digits. Floating-point results may be rounded.
How can I save the output?
Use Copy result to copy the displayed text, or Download to save it as a text file. The tool runs in your browser and does not require an account.
Calculate with your input
Check the calculated result, then copy or download it.