Regular decagon with congruence marks

An example figure from the Regular Polygon Generator.

A regular decagon with one tick mark on every side and an arc in every corner, and no numbers — A regular decagon, 10 sides, with a congruence tick on every side and a congruence arc in every corner, showing that all its sides and all its angles are equal. Nothing is labeled with a number, so students can name the polygon or work out its angle sum.

Edit this figure Download PNG

Editing opens it in the Regular Polygon Generator with these settings, to change anything and copy or download your own.

Answer key

Decagon: 10 sides
Side 8, apothem 12.3, radius 12.9
Each interior angle 144°, central angle 36°
Perimeter 80, area 492.4

Free to use in your tests, worksheets, slides or anything else. Open source under Apache 2.0. How to reuse our figures

More Regular Polygon examples

Make your own in the Regular Polygon Generator →