It is a noun- the name for a 3 sided shape.
A Noun
A Noun
An isosceles triangle is a noun. It is a triangle with two equal sides.
angle is the basic part of triangle
part of speech
The part of speech for this particular word is a noun.
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The not wrong part of a triangle
The part of speech for "explicit" is an adjective.
The part of speech for "twirl" is a verb.