# A thought experiment: Kant vs non-Euclidean geometry

## What is a real life example of a non-Euclidean geometry?

A non-Euclidean geometry is a rethinking and redescription of the properties of things like points, lines, and other shapes in a non-flat world. Spherical geometry—which is sort of plane geometry warped onto the surface of a sphere—is one example of a non-Euclidean geometry.

## Why was the discovery of non-Euclidean geometry important for philosophy?

The development of non-Euclidean geometry caused a profound revolution, not just in mathematics, but in science and philosophy as well. The philosophical importance of non-Euclidean geometry was that it greatly clarified the relationship between mathematics, science and observation.

## What is the main difference between Euclidean and non-Euclidean geometry?

While Euclidean geometry seeks to understand the geometry of flat, two-dimensional spaces, non-Euclidean geometry studies curved, rather than flat, surfaces. Although Euclidean geometry is useful in many fields, in some cases, non-Euclidean geometry may be more useful.

## How do you describe non-Euclidean geometry?

non-Euclidean geometry, literally any geometry that is not the same as Euclidean geometry. Although the term is frequently used to refer only to hyperbolic geometry, common usage includes those few geometries (hyperbolic and spherical) that differ from but are very close to Euclidean geometry (see table).

## What are the two main types of non-Euclidean geometry?

There are two main types of non-Euclidean geometries, spherical (or elliptical) and hyperbolic.

## Why is Euclidean geometry wrong?

There’s nothing wrong with Euclid’s postulates per se; the main problem is that they’re not sufficient to prove all of the theorems that he claims to prove. (A lesser problem is that they aren’t stated quite precisely enough for modern tastes, but that’s easily remedied.)

## Who discovered non-Euclidean geometry?

Carl Friedrich Gauss, probably the greatest mathematician in history, realized that alternative two-dimensional geometries are possible that do NOT satisfy Euclid’s parallel postulate – he described them as non-Euclidean.

## Who is the father of non-Euclidean geometry?

Gauss

Gauss invented the term “Non-Euclidean Geometry” but never published anything on the subject. On the other hand, he introduced the idea of surface curvature on the basis of which Riemann later developed Differential Geometry that served as a foundation for Einstein’s General Theory of Relativity.

## What did Lovecraft mean by non-Euclidean?

Non-Euclidean geometry is sometimes connected with the influence of the 20th-century horror fiction writer H. P. Lovecraft. In his works, many unnatural things follow their own unique laws of geometry: in Lovecraft’s Cthulhu Mythos, the sunken city of R’lyeh is characterized by its non-Euclidean geometry.

## Who discovered Euclidean geometry?

mathematician Euclid

Euclidean geometry, the study of plane and solid figures on the basis of axioms and theorems employed by the Greek mathematician Euclid (c. 300 bce).

## Is spherical geometry non-Euclidean?

Because a sphere and a plane differ geometrically, (intrinsic) spherical geometry has some features of a non-Euclidean geometry and is sometimes described as being one.

## What is the difference between Euclidean and spherical geometry?

Euclidean Geometry uses a plane to plot points and lines, whereas Spherical Geometry uses spheres to plot points and great circles. In spherical geometry angles are defined between great circles.

## What is the difference between hyperbolic and Euclidean geometry?

In hyperbolic geometry, two parallel lines are taken to converge in one direction and diverge in the other. In Euclidean, the sum of the angles in a triangle is equal to two right angles; in hyperbolic, the sum is less than two right angles.

## What is the difference between spherical and hyperbolic geometry?

In spherical geometry there are no such lines. In hyperbolic geometry there are at least two distinct lines that pass through the point and are parallel to (in the same plane as and do not intersect) the given line.

## What are the three different types of geometry?

The Three Geometries

• 2.1 Euclidean Geometry and History of Non-Euclidean Geometry.
• 2.2 Spherical Geometry.
• 2.3 Hyperbolic Geometry.

Nov 19, 2015

## What do you mean by Euclidean?

Definition of euclidean

: of, relating to, or based on the geometry of Euclid or a geometry with similar axioms.

## What are the 5 types of geometry?

The most common types of geometry are plane geometry (dealing with objects like the point, line, circle, triangle, and polygon), solid geometry (dealing with objects like the line, sphere, and polyhedron), and spherical geometry (dealing with objects like the spherical triangle and spherical polygon).