It makes it easier to stir the contents.
A wedge shaped portion of a circle is called a sector.
A circle has to be ring shaped (starting and finishing at the same point) otherwise it isn't a circle.
Saucepans are related to Llanelli because Llanelli was historically known for its tinplate industry, which produced items like saucepans. The town was a hub for metal industry, hence the association with the production of saucepans.
Did you know that the sun is circle shaped?
None, but we have a couple square-shaped.
"Circular", meaning shaped like a circle.
There are various reasons that manholes are shaped like a circle. For example, it is much easier to dig a circular hole.
a "Flat circle thing that's flat" ;)
it was a circle
sector
sliver
a tinker