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Mathematical Problems and the Definition of Pythagorean Theorem
In a right triangle, the square of the hypotenuse is equal to the sum of the squares of two right angles. If the two right angles of a right triangle are A and B and the hypotenuse is C, then A? +b? =c? , that is, α*α+b*b=c*c The definition of the square of the length of two straight sides:

In any right triangle, the sum of squares of two right-angled sides is equal to the sum of squares of the third side and the square of the length of the hypotenuse. In Rt△ABC, the sides are a, b and C(C is the hypotenuse), so a? +b? =c?

The sum of squares of two vertical sides of a right triangle = the square of the chord, A 2+B 2 = C 2, A is perpendicular to B.

In RT△, the sum of squares on both sides of a right angle is equal to the square of the hypotenuse.

Let the three sides of RT△ be A, B and C respectively (C is the hypotenuse).

Answer? +b? =c?

Answer? =c? -B?

b? =c? -a?

The smallest integer Pythagorean number is 3, 4 and 5, and it is also the most commonly used hook 3(a), strand 4(b) and chord 5(c).