noun
trigonometry
trih-guh-NO-muht-ree
noun
1
The branch of mathematics dealing with the relationships between the angles and sides of triangles.
"Trigonometry is used heavily in engineering and navigation."
How to Use Trigonometry
Learner’s notesIn plain EnglishThe math of triangles — angles, sides, and how they relate.
Word Forms
trigonometries plural
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_____ is used heavily in engineering and navigation.
Etymology
From Greek trigonon ("triangle") and metron ("measure"), coined in the 1610s as New Latin trigonometria.