Hemisphere calculator uses radius length of a hemisphere, and calculates the surface area and volume of the hemisphere.
Hemisphere calculator is an online Geometry tool requires radius length of a hemisphere. Using this calculator, we will understand methods of how to find the surface area and volume of the hemisphere.
It is necessary to follow the next steps:
A set of points in a space equally distanced from a given point $O$ is a sphere. The point $O$ is called the center of the sphere.
The distance from the center of a sphere to any point on the sphere is called the radius of this sphere.
A radius of a sphere must be a positive real number. The segment connecting two points on the sphere and passing through the center is called a diameter of the
sphere. All radii of the sphere are congruent to each other. A sphere can be obtained by rotating a semicircle about the diameter. Two spheres of the same radius are congruent.
Any cross section of a sphere by a plane is a circle. The circle obtained as a cross section of the sphere and plane through the center of the sphere is called a great circle. Any plane that passes through the center $O$ of a sphere divides it into two congruent parts well-known as hemispheres. The distance from the center of a hemisphere to any point on the hemisphere is called the radius of the hemisphere.
Many of the objects in nature are shaped as a half of a sphere. For example, the Earth is divided into two hemispheres: northern and southern. An ice cream cone is a combination of a cone and a hemisphere
Practice Problem 1 :
A hemisphere has a radius of $5$ centimeters. Find the volume of water that can be find in it.
Practice Problem 2 : A hemispherical grill has two racks, both are circular shape. The first rack has a radius of $20$ centimeters, while the second rack has a radius of $15$ inches. Find the difference in the surface areas of hemispheres with bases of these racks.
The hemisphere calculator, formula, example calculation (work with steps), real world problems and practice problems would be very useful for grade school students of K-12 education to understand the concept of volume & surface area of sphere and its part. This concept can be of significance in geometry, to find the volume & surface area of solids, for example a cylinder or cone with hemispherical ends. Real life problems on volume & surface area of hemisphere are very common, so this concept can be of great importance of solving problems.