rhizoverbBeta
DictionarytrigonometryMathematics of angles and triangles
noun

trigonometry

trig-uh-NAH-muh-tree/ˌtrɪɡəˈnɑːmətri/

The branch of mathematics studying relationships between angles and lengths.

The triangle, angle marks, and measuring tools are used in trigonometry.

A surveyor's plain drawing board holds a single right triangle with its right-angle square, one angle arc and three clear sides; a brass protractor and divider nearby.
Etymology
trigonoGreektriangle
+metryGreekmeasure

The pieces express “triangle measurement.” They name the branch of mathematics that studies how a triangle’s side lengths and angles relate to one another.

In context

CPD College2:05
center here by dividing 360 by eight and that gives us 45 degrees for each of these angles at the center to work out the area of the triangle using trigonometry we can work out the height of the triangle
Teachers TV: Surface Area: Octagon

More examples

  • She used trigonometry to solve the triangle.
  • The course introduces angles and trigonometry.
  • The survey required a practical knowledge of trigonometry.

Forms

trigonometry

Similar words

geometry
Geometry studies shapes and spatial relationships broadly; trigonometry focuses on angles and related lengths.
algebra
Algebra manipulates symbols and equations; trigonometry applies particular relationships involving angles.