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# Solid Geometry – 3D Shapes

## What are 3D Shapes?

3D shapes, also known as three-dimensional shapes, are geometric figures that have three dimensions: length, width, and height. These shapes are also referred to as solid figures.
Some common examples of 3D shapes include

• cubes,
• spheres,
• cylinders,
• cones,
• pyramids,
• and rectangular prisms.

Each of these shapes has its unique features, such as the number of faces, vertices, and edges, which help to identify and distinguish them from one another.

### Features of Solid Or  3D shapes

#### 1. Face

The surface of a solid is called the face of the solid. Solids can have a flat surface or a curved surface.

#### 2. Edge

Two adjacent faces of a solid meet upon a line segment. This is called the edge of the solid.

#### 3. Vertex

The point at which the three edges of a solid meet is called its vertex.

## Types of 3D Shapes

There are many types of 3D shapes, including:

1. Polyhedrons: These are solid shapes with flat faces and straight edges. Some examples of polyhedrons include cubes, tetrahedrons, dodecahedrons, and icosahedrons.

2. Spheres: These are three-dimensional objects with curved surfaces and a constant radius. A sphere is a set of all points in three-dimensional space that are equidistant from a given point called the center.

3. Cylinders: These are 3D shapes with two circular bases that are parallel to each other and connected by a curved surface. Examples of cylinders include cans, tubes, and barrels.

4. Cones: These are 3D shapes that have a circular base and a curved surface that tapers to a point called the apex. Examples of cones include traffic cones, party hats, and ice cream cones.

5. Pyramids: These are 3D shapes with a polygonal base and triangular faces that meet at a point called the apex. Examples of pyramids include the Great Pyramid of Giza, which has a square base, and the Luxor Hotel pyramid in Las Vegas, which has a rectangular base.

Torus: This is a doughnut-shaped 3D object with a circular cross-section and a hole in the center. The torus can be created by rotating a circle around an axis that is coplanar with the circle.

## List of solid shapes

Here is the list of solid shapes, which is given below:

### 1. Cuboid Shape ### 2.Cube Shape ### 3. Sphere

The sphere has 1 face. There are no edges and vertices. ### 4. Cylinder shape ### 5. Cone Shape 