Answer:
6
Step-by-step explanation:
The value of the square length of the hypotenuse is equal to sum of the square length of the two legs: let x represent the missing side
[tex]\sqrt{} 85^{2}[/tex] = 7^2 + x^2 calculate the powers
85 = 49 + x^2 subtract 49 from both sides
36 = x^2 find the root of the both sides
6 = x
