ELI5: Explain Like I'm 5

Trigonometry

Trigonometry is like the language of triangles: it's used to talk about angles and sides of triangles. It uses special words and math to help figure out lots of things about triangles, like the sizes of their angles and sides. In trigonometry, we also talk about circles and try to understand what happens when you draw a triangle inside a circle. It's like a secret code to unlock the secrets of shapes!