What is a ball?
This article describes what a ball is. From here you will learn the definition of the word “ball”, formulas for calculating its surface area and volume. Get all the minimum information you need about a ball from a school geometry course.
All geometry lessons are sure to learn such a shape as a ball. About what a ball, our article will tell.
A ball is a geometric body that is bounded by a surface, any points of which are located at the same distance from the center. This distance is called the radius of the ball.
The ball can be represented as a semicircle rotating around its fixed diameter, which is called the axis of the ball. Both ends of the diameter are poles. The surface of the ball is a sphere.
When the plane (cutting) intersects the center of the ball, such a section is called a large circle, all other sections are small circles.
The surface area of the ball can be recognized by the formula:
- S = 4πr2where r is the radius of the ball, and π = 3.14.
The volume of the ball is found by the formula:
- V = (4πr3) / 3, where r is the radius of the ball, and π = 3.14.
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