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Surface Area of a Sphere Formula

Result

S = 4 π a^2
(assuming radius a)

Example plot

Example plot

Equations

x(u, v) = a cos(u) sin(v)
y(u, v) = a sin(u) sin(v)
z(u, v) = a cos(v)

x^2 + y^2 + z^2 = a^2

Surface properties

2

g = 0

ds^2 = a^2 sin^2(v) du^2 + a^2 dv^2

dA = a^2 sin(v) du dv

x^_ = (0, 0, 0)

V = (4 π a^3)/3

I = ((2 a^2)/5 | 0 | 0
0 | (2 a^2)/5 | 0
0 | 0 | (2 a^2)/5)

K(u, v) = 1/a^2

(for a sphere with center at the origin and radius a)

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