# Opinions on **Sphere**

Here you have a list of opinions about Sphere and you can also give us your opinion about it.You will see other people's opinions about Sphere and you will find out what the others say about it.

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A **sphere** (from Greek σφαῖρα — *sphaira*, "globe, ball") is a perfectly round geometrical object in three-dimensional space that is the surface of a completely round ball, (viz., analogous to a circular object in two dimensions). Like a circle, which geometrically is a two-dimensional object, a sphere is defined mathematically as the set of points that are all at the same distance *r* from a given point, but in three-dimensional space. This distance *r* is the radius of the ball, and the given point is the center of the mathematical ball. The longest straight line through the ball, connecting two points of the sphere, passes through the center and its length is thus twice the radius; it is a diameter of the ball.

While outside mathematics the terms "sphere" and "ball" are sometimes used interchangeably, in mathematics a distinction is made between the sphere (a two-dimensional closed surface embedded in three-dimensional Euclidean space) and the ball (a three-dimensional shape that includes the sphere as well as everything inside the sphere). The ball and the sphere share the same radius, diameter, and center.

In the image below, you can see a graph with the evolution of the times that people look for Sphere. And below it, you can see how many pieces of news have been created about Sphere in the last years.

Thanks to this graph, we can see the interest Sphere has and the evolution of its popularity.

# What do you think of Sphere?

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