## How to hide apps on Samsung Galaxy J3 Pro

The feature allows you to hide apps that you want to keep from being seen by others.

In three-dimensional space, when you rotate a half circle with center O, radius R one circle around the axis, also known as diameter AB, will form a sphere.

Rotate the half circle around diameter AB to form a sphere

In three-dimensional space, the sphere is a collection of points equidistant from a fixed point O given a constant distance R.

Where, O is the center of the sphere and the distance R is the radius.

Spherical surface O with radius R

**Note** : Because the sphere is a type of space, the area of the sphere can be understood as the area of the spheres (Learn in item 4 of the article HERE ).

Spherical volume calculation helps you calculate the **capacity of all spheres** in the spatial frame of reference.

Full capacity inside the sphere

Formula for calculating the volume of the sphere

+ **r** : Spherical radius

+ **π** : Constant Pi (π = 3.14)

I will show you how to calculate the volume of a sphere through the following example: Given a sphere with a radius of 8cm from center O. What is the volume of the sphere?

Applying the above formula, you can calculate the spherical volume as follows:

Apply the formula for the calculation

Spherical area calculation helps you to calculate the area of the sphere inside the sphere.

Spherical surface with radius R

The formula for calculating the area of the sphere

+ **r** : Spherical radius

+ **π** : Constant Pi (π = 3.14)

+ **d** : Diameter of sphere

I will guide you how to calculate the area of the sphere through the following example: Given a sphere with a radius of 6cm from center O. What is the area of the sphere?

Applying the above formula, you can calculate the area of the sphere as follows:

Apply the formula for the calculation

**See also** :

>>> Synthesize a table of full, detailed and easy-to-understand trigonometric formulas

>>> Equations to calculate the area of a circle, the most complete circle's perimeter

Above are the formulas to calculate the area of the sphere and the volume of the sphere. Thank you for watching and see you in the following articles.

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