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Two times the product of two numbers *a* and *b*
divided by the sum of the numbers.

See Altitude.

See Sphere.

A seven-sided polygon.

A six-sided polygon.

A symbolic representation of discrete or continuous data, made using bars, where each bar represents a range of values when the variable is continuous.

One of the conic sections.

Center: O;

transverse (real) axis: AB;

conjugate axis: CD;

vertices: A, B;

asymptotes: the straight lines OE and OF.

The side opposite to the right angle in a right triangle.

copyright 2000 et seq. maddalena falanga & luciano battaia

first published on september 01 2003 - last updated on september 01
2003