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Mathematics

Reg.No:18014350009

Jincy John

About Spheres

Spheres

A sphere is a perfectly round

geometrical objects that is

3-dimensional with every point

on its surface equidistant from

its center

Spheres

Radius of a sphere

Radius

The radius of a sphere is

the distance from the

center to the surface.

Diameter of a sphere

Diameter

The diameter is always twice

the distance of the radius.

Surface Area

Surface area of sphere is the

product of the squares of its radius

by 4π.

Surface area =4πr2

Volume of a sphere

Volume of a

sphere= ⁴⁄₃πr3

Hemisphere

Section of a spherical shape by a plane

is called the hemisphere.

Curved surface area of hemisphere = 2πr2

Total Surface Area of hemisphere = 3πr2

Volume of hemisphere = ⅔πr3

Volume of Hemisphere

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