Sphere
Sphere
What is a Sphere?
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 the circular objects in two dimensions, where a "circle" circumscribes its "disk").
Video: What is a Sphere?
Like a circle in a two-dimensional space, a sphere is defined mathematically as the set of points that are all at the same distance r from a given point, but in a three-dimensional space. This distance r is the radius of the ball, which is made up from all points with a distance less than r from the given point, which is the center of the mathematical ball. These are also referred to as the radius and center of the sphere, respectively. 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 both the sphere and its ball.
How do you calculate the enclosed volume of a Sphere?
Video: Visualizing the Volume of a Sphere Formula | Deriving the Algebraic Formula With Animations
Circumscribed cylinder to a sphere
In three dimensions, the volume inside a sphere (that is the volume of a ball) is
where r is the radius of the sphere.
What is the surface area of a sphere?
Video: Finding the Surface Area of a Sphere
The surface area of a sphere of radius r is:
Video: Surface Area of a Sphere
What is the equation of a Sphere?
How many edges or faces are there on a Sphere?
0 edges and 0 faces.
Test Your Knowledge
- Log in or register to post comments
- Email this page
