What does each angle of a
regular octagon measure in degrees?
The mosque looks like a faceted cylinder: it has the form of a
regular octagon having a huge hall crowned with a big 16 m diameter dome.
Caption: Students examining the properties of polygonal models, like this one, based on the
regular octagon. (Photograph taken by author; used with permission).
The first is a
regular octagon (8R), with all its atoms having coordination number 3; the second is either a pair of pentagons or a nonregular octagon with two dangling bonds, denoted as 8N.
Then, I came upon the following description: "The text shows how to cut off irregular quadrilaterals from the corners of the parallelogram, to form an octagon; parts of the quadrilaterals are then attached to the first octagon to make it a
regular octagon" (Long & Crocker, 2000, p.