Answer:
x = 5 units
Explanation:
Use the Pythagorean Theorem:
a^2 + b^2 = c^2
Set Values for Variables:
Side Length - a = 12
Side Length - b = x
Hypotenuse - c = 13
* Hypotenuse is always opposite from the right angle.
Solve:
12^2 + b^2 = 13^2
144 + b^2 = 169
(Subtract 144 from both sides to get 25)
b^2 = 25
(Find square root of 25 and b^2)
b = 5
Conclude:
Now you know x (otherwise known as the b-value), is equal to 5 units.