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Why do traffic cones have wide bases and narrow tips?
This is for stability.
Are two cylinders with the same volume are congruent?
Two cylinders with the same volume are not necessarily congruent. One could have a different diameter and length than the other, and still have the same volume.
Two similar cones have radii of 9 and 1 respectively What is the ratio of their volumes?
729:1
Two similar cones have a radii of 6 and 1 what is the ratio of their volumes?
6 to 1
Name the faces of the 7 sided polyhedron?
There are a number of possible 7-sided polyhedra. Three that come immediately to mind are: a hexagonal pyramid, a pentagonal prism, a "stretched" triangular pyramid (triangular base, rectangular sides, and then triangular faces meeting at an apex).
Why are cylinders and cones not considered to be polyhedrons?
A polyhedron is defined as a "geometric solid in three dimensions with flat edges and straight faces". As both cylinders and cones have curved faces, neither are polyhedra.
Why are cylinders and cones not considered to be a polyh?
Polyhedra are 3-dimensional shapes bounded by polygons. Polygons are flat [plane] shapes bounded by straight lines. So a polyhedron cannot have any curved faces.
Can polyhedra objects roll?
Strictly speaking, no. But, as the number of faces increases, polyhedra can approximate cylinders or spheres and so can "roll".
Cylinders and cones are just polyhedrons with circular bases?
False. Cylinders and cones are not just polyhedrons with circular bases.
What is the fomula of volume?
There is no universal formula for volume: it depends on the shape. There are formulae for the volumes of some shapes such as cuboids (including cubes), cones, ellipsoids (including spheres), regular polyhedra (including pyramids), prisms (including cylinders). But there are many more irregular shapes for which no formulae exist.
How are pyramids and cones different than prisms and cylinders?
Pyramids and cones have a pointed top (apex) while prisms and cylinders have flat tops. Pyramids and cones have a single base, while prisms have two parallel bases. Cones have a curved surface while pyramids have triangular faces.
Which three-dimensional figures have circular bases?
Cones, cylinders.
Why aren't cylinders and cones and spheres polygons?
polygons have faces and cylinders and cone and spheres only has bases not faces.
What 3 dimensional figure has a round base?
Cones, hemispheres, and cylinders have.
What is the similarity among spheres cones and cylinders?
A circular cross-section.
What are examples of prisms pyramids cylinders and cones in real life?
Prisms: Feed troughs, bathtubs, and boxes. Pyramids: Pyramids of Egypt and the Aztecs. Cylinders: Cans, pistons, tubes, and pipes. Cones: Ice cream cones, funnels, and the bottom part of a water tower.
Why aren't cylinders cones and spheres polyhedrons geometry?
polyhedrons need flat face and edges, corners which cylinder cones don't have.
