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).