frustum of a cone
conical frustum

The tower is formed as a "frustum of a cone".

However, actual instrument bores approximate a frustum of a cone.

You'll find space abaft that, frustum of a cone, sort of.

Each plate has a ring pressed into it, V-shaped in section and forming a frustum of a cone with each side.

The taper plug gage is an internal gage in the shape of the frustum of a cone.

The volume of each segment is calculated as the volume of a frustum of a cone where:

The fruits are yellowish, tubercular like the stems, and shaped something like the frustum of a cone, with a hollow at the wide end where the flower fell off; they are often mistaken for flowers.

An open conical tube, that is, one in the shape of a frustum of a cone with both ends open, will have resonant frequencies approximately equal to those of an open cylindrical pipe of the same length.

Metal mould, in the shape of the frustum of a cone, open at both ends, and provided with the handle, top internal diameter 102 mm, and bottom internal diameter 203 mm with a height of 305 mm.

The volume of a cylinder was taken as the product of the base and the height, however, the volume of the frustum of a cone or a square pyramid was incorrectly taken as the product of the height and half the sum of the bases.

Certain ancient Native American mounds also form the frustum of a pyramid.

It is named after Hero of Alexandria, and used in finding the volume of a frustum of a pyramid or cone.

Problem 14 in the Moscow Mathematical Papyrus gives the only ancient example finding the volume of a frustum of a pyramid, describing the correct formula:

The earliest fleeting reference to square roots of negative numbers occurred in the work of the mathematician and inventor Heron of Alexandria in the 1st century AD, when he considered the volume of an impossible frustum of a pyramid.

For the volume of a frustum of a pyramid, he gives the "pragmatic" value as the depth times the square of the mean of the edges of the top and bottom faces, and he gives the "superficial" volume as the depth times their mean area.