A pentagon is a five-sided figure, typically found in geometry. The Pentagon in Washington D.C. is five sided and named after the polygon. A pentagon is a thing, so it would be a noun.
Some examples of sentences where the word pentagon functions as a noun are:
"A pentagon has five sides." (subject)
"That shape is a pentagon." (Predicate Nominative; a nominative is a fancy word for noun)
Hope that helps!
The adjective form of concept is conceptual.The adjective form of conception is conceptional.
The adjective form for the pronoun they is their.
The adjective form of concept is conceptual.The adjective form of conception is conceptional.
The adjective form is decisive.
The adjective form for the noun need is needy.The adjective form for the verb to need is needed.
The adjective form of concept is conceptual.The adjective form of conception is conceptional.
The adjective form is cranial.
The adjective form for the pronoun they is their.
The Adjective form of Pathologist is Pathological.
The adjective form of concept is conceptual.The adjective form of conception is conceptional.
The adjective form of improve is "improved."
The plural form of the noun 'adjective' is adjectives.
The adjective form for the verb to develop is developable.
The adjective form of retire is :- retired, retiring.
Financial is the adjective form.
The adjective form is abdominal.
The adjective form is decisive.