Question

Definition of hemisphere in maths

Answer 1

In geometry it is an exact half of a sphere. It also refers to half of the Earth, such as the "Northern Hemisphere" (that part of the Earth north of the equator), or "WesternHemisphere" (the half of the Earth west of a line running from the North Pole through England to the South Pole, includes the Americas) Sphere.

Answer 2

A half of the sphere is called hemisphere.

Formula :

Volume = 2/3 (πr3)