Three dimension shapes

The shapes which can be measured in 3 directions are called three-dimensional shapes. These shapes are also called solid shapes. Length, width, and height (or depth or thickness) are the three measurements of the three-dimensional shapes. They are different from 2D shapes because they have thickness. A number of examples can be found in everyday life. Some of them are:

Three Dimensional Shapes

The Rubik’s Cube is an example of a cube, the drum is a cylinder, the birthday cap is a cone and the orange is a sphere.

Faces, Edges and Vertices

Three-dimensional shapes have many attributes such as faces, edges and vertices. The flat surfaces of the 3D shapes are called the faces. The line segment where two faces meet is called an edge. A vertex is a point where 3 edges meet.

Let us consider a few shapes to learn about them.

Cube

• All edges are equal
• 8 vertices
• 12 edges
• 6 faces.

Cuboid

• 8 vertices
• 12 edges
• 6 faces

Prism

• 6 vertices
• 9 edges
• 5 faces – 2 triangles and 3 rectangles

Square Pyramid

• 5 vertices
• 8 edges
• 5 faces

Cylinder

• No vertex
• 2 edges
• 2 flat faces – circles
• 1 curved face

Cone

• 1 vertex
• 1 edge
• 1 flat face – circle
• 1 curved face

Sphere

• No vertex
• No edges
• 1 curved face
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• REFERENCE FROM   https://byjus.com/maths/three-dimensional-shapes/