Assuming plane geometry, the sum of all the internal angles of any octagon is 1080°. As with all polygons, the external angles total 360°.

The meaning of OCTAGONAL is having eight sides. How to use octagonal in a sentence.

OCTAGONAL definition: having eight angles and eight sides. See examples of octagonal used in a sentence.

It is actually an octagonal shape, which meets criteria to be defined as a round barn.

Define octagonal. octagonal synonyms, octagonal pronunciation, octagonal translation, English dictionary definition of octagonal. adj. Having eight sides and eight angles. oc·tag′o·nal·ly adv. …

Octagons are classified into various types based upon their sides and angles. Let us learn more about the octagon shape in this article. What is an Octagon? An octagon can be defined as a polygon with …

May 23, 2026 · Adjective octagonal (not comparable) (geometry) Shaped like an octagon, in having eight sides and eight angles.

Here, we hope you will find an excellent tool for calculating the diagonals, perimeter, circumradius, inradius, and area of a regular octagon.

octagonal in American English (ɑkˈtæɡənl) adjective having eight angles and eight sides

octagonal, adj. meanings, etymology, pronunciation and more in the Oxford English Dictionary