unknown leg length in right tringles

which equation can be used to find the unknown length, b, in this triangle?
5 in.
4^2*b^2=5^2
4^2-b^2=5^2
5^2+4^2=b^2
5^2+b^2=4^2

answer:

4² + b² = 5²

step-by-step explanation:

side lengths in right triangles can be calculated with pythagorean theorem.

a² + b² = c²

"c" is the hypotenuse, the longest side.

"a" and "b" are the other two sides, it does not matter which one is "a" or "b".

in this problem, you are missing "b", which is not the hypotenuse. use the formula.

4² + b² = 5²

the correct answer is d

hope this