Question

which of the following is the missing side length that completes Pythagorean triple below

Answer 1

Pythagorus Theorm
a sqr + b sqr = c sqr
25 sqr + 7 sqr = c sqr
625 + 49 = c sqr
625 + 49 = 674

c = sqr root of 674
c = 25.96 (rounded to 2dp)

Answer 2

the hypotenuse length is 25 and the length of one of the sides is 7.

According to the Pyth. Thm., 25^2 = 7^2 + s^2, or 625-49 = s^2.

The missing side length is s = sqrt(576) = 24.  (Omit s = -24).