Saturday 3 December 2011

Cuboid




cuboid



Cuboid is a polyhedron with six rectangular plane faces. There are 12 edges and 8 vertices in a cuboid. Cuboid is also called as right rectangular prism or rectangular parallelepiped box.  If all the edges of a cuboid are equal then it forms a cube. In a cuboid opposite faces are equal and parallel and all angles are right angles. Cuboids are the simplest of all solid shapes, with six faces consisting of squares and rectangles.Cuboids are very common in our world, from boxes to buildings we see them everywhere. You can even fit them inside other cuboids!
A = 2wl + 2lh + 2hw


V = 4×5×10 = 200

A = 2×4×5 + 2×5×10 + 2×10×4
   = 40+100+80 = 220 



The cuboid has 6 sides, 8 vertices, and 12 faces.  To calculate the surface area or volume of the cuboid, use the same formula as you would for the cube.


Note: The name "cuboid" comes from "cube" and -oid (which means "similar to, or resembling") and so indicates "it is like a cube".
Another use of -oid is when we talk about the Earth being a spheroid (not exactly a sphere, but close).






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