noun
octagon
AHK-tuh-gahn/ˈɑːktəɡɑːn/
A shape with eight straight sides and eight angles.
This octagon has eight straight sides and eight distinct corners.
Etymology
The pieces literally describe an 'eight-angled' figure: the name counts corners rather than sides. In a polygon, those eight corners also give it eight sides.
In context
here is a great tile shape it has got eight equal sides so it must be a regular octagon
More examples
- A standard stop sign is shaped like an octagon.
- She draws an octagon with a ruler.
- The floor pattern combines octagons with small squares.
Forms
octagon · octagons
octagonal adjective — Having eight sides and eight angles.
Similar words
- polygon
- A broader term for closed shapes with any number of straight sides.