]]>
LearnNext
Get a free home demo of LearnNext

Available for CBSE, ICSE and State Board syllabus.
Call our LearnNext Expert on 1800 419 1234 (tollfree)
OR submit details below for a call back

clear

Sphere and Hemisphere

48,072 Views
Have a doubt? Clear it now.
live_help Have a doubt, Ask our Expert Ask Now
format_list_bulleted Take this Lesson Test Start Test

Sphere and Hemisphere - Lesson Summary

A sphere is a three dimensional figure, made up of points that are equidistant from a given point. It does not have an edge or a vertex. The surface of a sphere is uniform and smooth. The centre of a sphere is a point, which is equidistant from all the points on the sphere.

The distance between the centre and any point on the surface of the sphere is called the radius of the sphere. Generally the radius is denoted by the letter r.



A line segment through the centre of the sphere, and with the end points on the sphere is called a diameter of the sphere.

Surface area of a sphere (A) = 4πr2

Volume of a sphere (V) = 4 3 πr3
 
A plane through the centre of a sphere divides the sphere into two equal parts, each of which is called a hemisphere.

A hemisphere has two faces. A flat surface which is called as the base and a curved surface.

Surface area of a hemisphere = 2πr2

Total surface area of a hemisphere = 3πr2
 
Volume of a hemisphere = 2 3 πr3

Comments(0)

Feel the LearnNext Experience on App

Download app, watch sample animated video lessons and get a free trial.

Desktop Download Now
Tablet
Mobile
Try LearnNext at home

Get a free home demo. Book an appointment now!

GET DEMO AT HOME