A CUBE

Do you know about CUBE ?
Look at the pictures below !

                                       
A box, a rubiks, and a dice above are cuboid. Mention other the cuboid objects! 

Parts of A Cube
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Face :	Also called facets or sides. A cube has six faces which are all squares, so each face has four equal sides and all four interior angles are right angles.
Edge :	A line segment formed where two edges meet. A cube has 12 edges. Because all faces are squares and congruent to each other, all 12 edges are the same length.
Vertex:	A point formed where three edges meet. A cube has 8 vertices

The sides of ABCD.EFGH CUBE is:

1 ) ABCD side

2 ) ABFE side

3 ) ADHE side
4 ) EFGH side
5 ) DCGH side
6 ) BCGF side
So, a cube has six sides.

The edges of ABCD.EFGH CUBE is:
 1 ) AB edge
 2 ) EF edge
 3 ) HG edge
 4 ) DC edge
 5 ) BC edge
 6 ) FG edge

 7 ) EH edge
 8 ) AD edge
 9 ) AE edge
10) BF edge
11) CG edge
12) DH edge
So, a cube has twelve edges.

The vertices of ABCD.EFGH CUBE is:
 1 ) A vertex
 2 ) B vertex
 3 ) C vertex
 4 ) D vertex
 5 ) E vertex
 6 ) F vertex

 7 ) G vertex
 8 ) H vertex
So, a cube has eight vertices.

Base on the description above, we can describe the definition of cube as follows: 

Definition of Cube

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A solid with six congruent square faces. A regular hexahedron.

The Net of A Cube

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A pattern that you can cut and fold to make a model of a solid shape.A pattern from combination of six square shape cuboid. 

This is a net of a cube.

There are eleven nets of a cube.

Volume and Surface Area of A Cube

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To find volume of cube with use this formula:

Volume = (Edge Length)³

To find surface area of cube with use this formula:

Surface Area = 6 × (Edge Length)²

A cube is also called a hexahedron because it is a polyhedron that has 6 (hexa- means 6) sides.

Cubes make nice 6-sided dice, because they are regular in shape, and each face is the same size.
In fact, you can make fair dice out of all of the Platonic Solids.

EXERCISE