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unit of measure: the base unit | the supplementary unit | the derived unit

*geometry: the area of a flat figure | the area of a solid | the volume of the solid*

A ** layer of a sphere ** is a part of a sphere that is sectioned between two parallel planes of sectioning. Spherical girdle is the curve surface of the spherical layer. The circles ABC and DEF are bases of the spherical girdle. The distance between bases is the height of the spherical layer.

where:

r_{1}, r_{2} — the radiuses of bases;

h — the height of a layer of a sphere.

*For separation of number integers and decimals, use the symbol – point [.]*

context information: contemporary and archaic unit of measurement of area