3D shapes are three-dimensional solids that occupy space and have length, width, and height. They are a fundamental concept in geometry and are used to describe objects in the physical world. Examples of 3D shapes include:

• Cubes and rectangular prisms

• Spheres and hemispheres

• Cones and pyramids

• Cylinders and cones

• Prisms and pyramids with various base shapes

Understanding 3D shapes is essential in various fields, such as architecture, engineering, art, and design, as they help to create and describe three-dimensional structures and objects.

3D shapes are solid objects with three dimensions: length, width, and height. They have depth and take up space, unlike 2D shapes which are flat and only have length and width. 

Properties 

• Faces: Flat or curved surfaces on a 3D shape

• Edges: Where two faces meet

• Vertices: Corners where edges meet

Examples 

• Cube: A 3D square with six square faces, eight vertices, and 12 edges

• Sphere: A 3D circle with one curved surface, no edges, and no vertices

• Cone: A 3D triangle with a circular base

• Cylinder: A 3D shape with a circular base and three faces

• Square pyramid: A 3D triangle with a square base

• Triangular prism: A 3D shape with identical triangle bases

• Cuboid: A 3D rectangle with six rectangular faces

Real-world examples Soccer balls, Books, Buckets, and Bowls.

3-dimensional shapes have thickness or depth compared to 2D shapes, which are flat. The common types of 3D shapes include a cube, sphere, cone, pyramid, rectangular prism, and cylinder. A polygon is any two-dimensional shape with straight lines.

In geometry, 3D shapes are solid shapes or figures that have three dimensions. Generally, length, width and height are the dimensions of 3D shapes (three-dimensional shapes). The common names of these shapes are cube, cuboid, cone, cylinder and sphere.