The Pythagorean theorem is the Pythagorean theorem.

Pythagorean theorem is one of the elementary geometry theorems, one of the important math theorems discovered and proved by mankind in the early days, one of the most important tools to solve geometric problems with the idea of substitution number, and one of the number combination ties. The Pythagorean theorem is a special case of the cosine theorem. The Pythagorean theorem has about 400 proofs, which is one of the most proofs in math. "Three strands, four strings and five strings" is the most basic formulas of the Pythagorean theorem. number group Equation a2 + b2 = c2's positive integer number group (a,b,c). (3,4,5) is the hook number. in other words, let the two right Angle trigonometric sides a and b, hypotenuse is c, then a2+b2=c2, trigonometric square sum be tantamount to hypotenuse square.

a^2 + b^2 = c^2