Pythagorean theorem  Triangles
Pythagorean theorem
In the nutshell, Pythagorean theorem/Pythagorean relationship describes the relationship between the lengths and sides of a right triangle. After thousands of repeated examinations by the ancient Greek mathematicians, it was found that the square of the hypotenuse is equal to the sum of the squares of the other two sides c² = a² + b².
Basic concepts:
 Introduction to Exponents
 Classifying Triangles
Lessons

2.

3.
Find x.