1. Definition (Manim)

Introduction

evt: bedütig, berechnig, bispil

it is basically a correlation of the lengths of a rectangular triangle, so when we know 2 side lengths of a triangle we can calculate the third one using the pythagorean theorem it goes like this:

(Valid for all rectangular triangles → no matter orientation, two angles and scale of triangle)

(length of first leg, which is a number since a length is a number)*(length of first leg)+ (length of second leg, which is a number since a length is a number)*(length of second leg) = (length of third leg, which is a number since a length is a number)*(length of third leg)

what dos it say:
given a rectangular triangle of which we know two side lengths, we can calc the third one using

a^2 + b^2 = c^2

where a & b are the legs and c is the hypothenuse

and for all real world triangles a,b and c are numbers but because its true for all numbers we just use letters as containers for numbers that can take the number of the specific triangle of your situation

maybe very short numerical example,3,4,5