All about Three Dimensional Shapes (3D Shapes) - Definition ,pictures, explanation(let's plug in #8)

 How are you? Hope you doing well..

Today we learn about 3D shapes.

           

Have you gone through the previous blog about 2D shapes?

If do go through it, It's very interesting and helps you to better understand 2D shapes by clicking here Triangle to Icosagon (2D shapes).

Here we are going to see about 3D shapes. Here 3D stands for three-dimensional.

3D shapes have three different measurements such as length, width and height as its dimensions.

3D shapes have depth, thickness, and volume but 2D shapes have not.

The faces of the 3D shapes are 2d shapes.

Depending  on the type of surface, 3D shapes are categorized into two

1. Curved shaped solid 

2. Straight sided polygon or polyhedrons

Curved shaped solids

3D shapes that have curved surfaces are called curved solids

examples are

1. Sphere

2. Cone

3. cylinder

Straight sided polygon or polyhedrons

3D shapes with straight sides are called straight-sided polygons. They are also known as Polyhedrons or polyhedra. Polyhedrons should have straight edges. It should have flat sides called the faces. It must have corners, called vertices.

                                                                                                              

Common examples are

1. Cube

2. Cuboid

3. Pyramid

4. Prism

Regular and Irregular Polyhedrons                                                                                      

Based on the edge length polyhedrons are classified into two.

Regular polyhedrons are made upon regular polygons. It also known as platonic solids.

The arrangement of vertices, edges, and faces in regular polyhedrons demonstrates symmetry, and the faces are congruent regular polygons.

Some common examples of regular polyhedrons are 

cubes 

tetrahedrons, 

octahedrons, 

dodecahedrons, 

and icosahedrons.

An irregular polyhedron is formed by polygons having different shapes .

Polyhedrons that don’t fit into the criteria of regularity are called irregular polyhedrons. Their vertices, edges, and faces are not symmetrically arranged, and they do not all have congruent or regular polygonal faces.

Examples are Cuboid, Irregular Dodecahedrons, and Irregular Icosahedrons.

Convex Polyhedron and Concave Polyhedron

Based on the surface diagonal polyhedrons classified into two.

Convex Polyhedron

Convex polyhedron is a polyhedron with convex polygons on each face and flat surfaces throughout. Inner angles of all its faces are less than 180 degrees.

Examples: regular tetrahedron, cube, octahedron, dodecahedron, icosahedron

concave polyhedron

A concave polyhedron is a particular kind of polyhedron that has at least one concave face, or one with an interior angle higher than 180 degrees.

thats all , stay tunned for the next blog!!!