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triangle
triangle m

Triangle. A polygon with three sides. Triangles can be classified in a number of ways.

An isosceles triangle has two equal sides (and therefore two equal angles)

A scalene triangle does not have two equal sides.

A right-angled triangle has an interior angle equal to a right angle

An equilateral triangle has three equal sides (and therefore three equal angles)

trigonometry
trigonométrie f

Trigonometry. A branch of mathematics concerned - at its simplest level - with measuring triangles. Unknown angles and lengths are calculated using trigonometric ratios such as sine, cosine, and tangent.

Trigonometry is also concerned with the study of the properties of different trigonometric functions and their applications to solve equations in many branches of mathematics.

trinomial
trinôme m

Trinum. It is any polynomial that contains only three terms. For example:
. 3x2+4x+1 and x4+x²-5


truncated
tronqué

Truncated. The truncated cone or prism is formed from the original solid by removing parts of it by means of. cutting planes, as shown in the figure below.

Truncated cuboid
Truncated cone

turning point
point m critique

Inflection point. A point on a graph of a function, which is the local maximum or minimum of the function.

At the inflection point, the derivative of the function is equal to zero.

Two inflection points