Related formsde·cag·o·nal [duh-kag-uh-nl] /dəˈkæg ə nl/, adjective
Examples from the Web for decagon
In the fourth are six triangles, in the fifth, five polygons from a pentagon to a decagon.The Montessori Method|Maria Montessori
Decagon, dek′a-gon, n. a plane figure of ten angles and sides.
The plan of the church was a decagon, within which six composite columns in the centre supported six semi-circular vaults.Old and New London|Walter Thornbury
Below the arches are the chapels which surround the decagon in symmetrical fashion.The Cathedrals and Churches of the Rhine|Francis Miltoun