a cookie
An octagonal prism.
A tent...
Kites, computer screens, computer keys, and wireless routers are just a few objects shaped like quadrilaterals.
There are no ordinary household objects shaped like a decagon. Some glasses or vases may be decagonal in shape.
stop signssome boxespicture framessome clockspickle jar tops
A stop sign is shaped like an octagon.
A stop sign
Some objects that are shaped like an oval include eggs and footballs.
An octagonal prism.
a stop sign
A Stop Sign. How do you not know this?!
A tent...
eggs
A sphere.
There are no ordinary household objects shaped like a decagon. Some glasses or vases may be decagonal in shape.
Kites, computer screens, computer keys, and wireless routers are just a few objects shaped like quadrilaterals.
Scrystals and the cells in a bees honeycomb nest