All three views of the cube are squares. The side length of a square is equal to the side length of any cube.

Definition of cube: A three-dimensional figure surrounded by six identical squares is called a cube.

A three-dimensional figure surrounded by six identical squares is called a cube. A straight parallelepiped with square sides and bottom is called a cube, that is, a hexahedron with equal sides, also called a cube or a regular hexahedron. Cubes are special cuboids. The volume of a cube (or called the volume of a cube) = side length × side length × side length; Let the side length of a cube be a, then its volume is: V=a×a×a or equal to a? .

Triangle-the diagonal line passing through a vertex and the opposite line. A rectangle that passes through two opposite sides or an edge. Square, parallel to the surface A pentagon passes through points on four sides and a vertex or points on five sides. Hexagon, passing through points on six sides. Regular hexagon, passing through the midpoint of six sides. Diamond, passing through the opposite vertex. Trapezoidal, passing through parallel lines with different lengths on two opposite faces.

First, take the diagonal of the upper bottom surface and calculate, and get that the diagonal of this surface and the edge it intersects are the edges perpendicular to the upper bottom surface, and the hypotenuse of this right triangle is the body diagonal. According to Pythagorean theorem, it is concluded that the diagonal = root sign of an object is three times the side length.

Introduction of cuboid:

A three-dimensional figure surrounded by six rectangles (two opposite faces are squares in special cases) is called a cuboid. Cubes are also special cuboids. Cuboid: a closed three-dimensional figure surrounded by six rectangles is called a cuboid, and the opposite sides of any side of the cuboid are exactly the same as it.

Each rectangle of a cuboid is called a cuboid face, the line where the face intersects the face is called an edge of the cuboid, the point where the three edges intersect is called the vertex of the cuboid, and the length where the three edges intersect at a vertex is called the length, width and height of the cuboid respectively. A straight parallelepiped with a rectangular bottom. The length, width and height of a cuboid are three degrees respectively, and the sum of squares of the cuboid's three degrees is equal to the square of its diagonal. Is the volume of a cuboid equal to the product of its length, width and height? .

A cuboid must have six faces. Generally, each face is rectangular, and at least two opposite faces are exactly the same. Under special circumstances, two faces are square, and the other four faces must be rectangular, and they are exactly the same. A cuboid has 12 sides, and the sides are equal in length. Can be divided into three groups, each group has four sides. It can also be divided into four groups, each group has three sides.