## Three Dimensional Shapes or Solids

### Three-dimensional shapes, also known as solids, are objects that have length, width, and height

Three-dimensional shapes, also known as solids, are objects that have length, width, and height. They exist in three dimensions and occupy space. Unlike two-dimensional shapes, which only have length and width, three-dimensional shapes have volume.

Some common examples of three-dimensional shapes include:

1. Cubes: A cube is a solid object with six equal square faces. All angles in a cube are right angles, and all edges have the same length.

2. Rectangular prisms: A rectangular prism is a solid object with six rectangular faces. It has eight vertices (corners), and all angles in a rectangular prism are right angles.

3. Spheres: A sphere is a perfectly round three-dimensional object. It does not have any faces, vertices, or edges. The surface of a sphere is curved, and all points on the surface are equidistant from the center.

4. Cylinders: A cylinder is a solid object with two circular bases that are parallel and congruent. The curved surface of a cylinder connects the two bases.

5. Cones: A cone is a solid object with a circular base and a pointed top called the apex or vertex. The curved surface of a cone connects the base and the apex.

6. Pyramids: A pyramid is a solid object with a polygonal base and triangular faces that meet at a common vertex called the apex. The base can be any polygon, such as a triangle, square, pentagon, etc.

These are just a few of the many three-dimensional shapes that exist. Each shape has its own unique properties, such as surface area, volume, and specific formulas for calculating these measurements.

Understanding three-dimensional shapes is crucial in various fields such as architecture, engineering, geometry, and even everyday life. They help us describe and analyze objects in three-dimensional space, allowing for precise measurements and calculations.

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