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slant
oblique m

A slant line. It is the distance | between the vertex of a right cone and a point on the edge of the circular base measured along the curved surface of the cone, and is called the slant height of the cone. See cone.

This measurement is used to calculate the area of ​​the curved surface of a right cone. Area = πrl .

slide rule
règle f de calcul

Rule. A calculating tool that looks similar to a regular ruler but has a sliding logarithmic scale that can be used for multiplication
and division and extracting roots. .. etc.

Rules were widely used by engineers, draftsmen and others who worked with large numbers.

Today, they have been largely replaced by electronic calculators as practical calculating tools.

small circle
petit cercle m

Small circle. A circle drawn on the surface of a sphere whose center does not coincide with the center of the sphere. This term is most commonly used in connection with the geography of the Earth. All latitudes are small circles (except the equator, which is a great circle) whose centers lie along a common diameter of the Earth. See the drawing below.

solid of revolution
solide m de révolution

Solid of revolution. The solid resulting from the rotation of a plane surface 360° about an axis.

The figure above shows the solid formed by rotating the area under the curve (y= f(x between x=a and x=b about the x-axis. The plane area that draws the solid is:

The surface area of ​​the solid resulting from the rotation is:

The volume of the solid resulting from the rotation is:

solution
solution f

A solution is the process of solving a mathematical problem and its result, often in the form of an equation. For example:

The solution to 3x +4 = x+12 is 4 = x
The solution to dy / dx=x is y = x2 / 2 + A .

The solution to the set 4>x2 is the interval [2,2-].