In geometry, a spherical segment is the solid defined by cutting a sphere with a pair of parallel planes. It can be thought of as a spherical cap with the top truncated, and so it corresponds to a spherical frustum.

Radius of sphere: R

Radius of bases: r

_{1}, r

_{2}

Height: h

Area of spherical surface: S

_{S}

Area of plane end faces: S

_{1}, S

_{2}

Total surface area: S

Volume: V

- $S_S=2πRh$
- $S=S_S+S_1+S_2=π(2Rh+r_1^2+r_2^2)$
- $V=π/6h(3r_1^2+3r_2^2+h^2)$

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