The noun 'pyramid' is a singular, common, concrete noun; a word for a shape or structure with a polygon for its base and three or more triangles for its sides which meet to form the top; a word for a thing.
The word 'pyramid' is also a verb: pyramid, pyramids, pyramiding, pyramided.
You got it right, "pyramid!"
No, it is a verb or a noun (to go around, to surround; a round shape). The adjective form is circular.
It is an adjective.It is a an adjective.
a story that had a arrangement like a pyramid
No, it is an adverb. The adjective is clumsy.
No. Pyramids is a plural noun. The adjective form would be pyramidal.
No, a pentagonal is an adjective, not a noun. So it is not any thing - just a description of some thing. The question is like asking if "smooth" is a pyramid.
A Tetrahedral * * * * * It is a tetrahedron (tetrahedral is its adjective). And, in any case it IS a pyramid - with a triangular base.
A quadrangular is an adjective, not a noun. A quadrangular pyramid will have a different number of faces from a quadrangular prism, for example.
There can be a quadrangular pyramid or a quadrangular prism or other quadrangular shapes. "Quadrangular" is an adjective, not a noun. You need to be more specific.
"triangular" is an adjective - it is not enough to define a shape. You can have a triangular pyramid or a triangular prism and there will be different methods to calculate their volumes.
A rectanglar or even rectangular, is an adjective and there is no such thing. You can have a rectangular pyramid or a rectangular prism. The formula will depend on which of these it is and on what information is available to you.
Heptagonal is an adjective: the answer depends on the noun that it refers to. A heptagonal pyramid, a heptagonal dipyramid or a heptagonal prism or some other heptagonal shape?
"Triangular" is an adjective and so cannot have any of anything. You need a noun to go with the adjective to make it a subject of the question: such as triangular lamina, or triangular pyramid or triangular prism, or triangular dipyramid or whatever. And in each case, the answer will be different!
The Pyramid of Khafre The Pyramid of Khafre
A pyramid....
Rectangular is an adjective, not a noun so there is no such thing as a rectangular. You an have a rectangular lamina, a rectangular pyramid, a rectangular prism, a rectangular antiprism and they all have different solid shapes.