By Sunil Tanna

ISBN-10: 150308485X

ISBN-13: 9781503084858

This booklet is a consultant to the five Platonic solids (regular tetrahedron, dice, ordinary octahedron, ordinary dodecahedron, and standard icosahedron). those solids are vital in arithmetic, in nature, and are the one five convex standard polyhedra that exist.

themes lined comprise:

- What the Platonic solids are
- The historical past of the invention of Platonic solids
- The universal positive factors of all Platonic solids
- The geometrical info of every Platonic stable
- Examples of the place every one kind of Platonic sturdy happens in nature
- How we all know there are just 5 different types of Platonic good (geometric facts)
- A topological facts that there are just 5 forms of Platonic stable
- What are twin polyhedrons
- What is the twin polyhedron for every of the Platonic solids
- The relationships among each one Platonic sturdy and its twin polyhedron
- How to calculate angles in Platonic solids utilizing trigonometric formulae
- The courting among spheres and Platonic solids
- How to calculate the outside quarter of a Platonic stable
- How to calculate the amount of a Platonic reliable

additionally incorporated is a short advent to a few different attention-grabbing varieties of polyhedra – prisms, antiprisms, Kepler-Poinsot polyhedra, Archimedean solids, Catalan solids, Johnson solids, and deltahedra.

a few familiarity with easy trigonometry and extremely uncomplicated algebra (high institution point) will let you get the main out of this publication - yet that allows you to make this booklet obtainable to as many of us as attainable, it does comprise a quick recap on a few valuable simple thoughts from trigonometry.

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**Additional resources for Amazing Math: Introduction to Platonic Solids**

**Example text**

We apologize if any such errors are found, and would appreciate if readers inform of any errors they might find, so we can update future editions/updates of this book. Answers 2000 Limited is a private limited company registered in England under company number 3574155. com/math Introduction For some time now, I have been tutoring both adults and children in math and science. As a result, I have discovered that many people of all ages have a latent interest (and talent) in mathematics that is somehow never got fully awoken while in school.

The vertex angle (the angle between edges at a vertex) is 60° for edges which are part of the same face, and 108° for edges which are not. Here is a net (unfolded version) of an icosahedron: Regular Icosahedra in Nature Icosahedral structures occur in a number of chemical compounds including closo-carboranes (carboranes are clusters of carbon, boron and hydrogen atoms – formed in the shape of a polyhedron. Some carboranes may be missing one or more vertices of the polyhedral shape, but closo-carboranes have a complete set of vertices), some allotropes of boron (solid boron can come in several different forms, each form is known as an allotrope), and many borides (chemical complexes formed from metallic elements and boron).

These are known as the "Kepler-Poinsot polyhedra". Each of these polyhedra has a star-like shape, so they are sometimes called "star polyhedra". Two of these star polyhedra were discovered by the Middle Ages or possibly earlier, although it is not clear who discovered them. The other two star polyhedra were discovered by French mathematician Louis Poinsot (January 3rd, 1777 to December 5th, 1859) in 1809. After his discovery, Louis Poinsot was unsure if there were any more types of star polyhedra.

### Amazing Math: Introduction to Platonic Solids by Sunil Tanna

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