Answer:
4 feet
Step-by-step explanation:
The formula to solve for the hypotenuse is
hyp^2= side^2+side^2
But in this question, we don't have to solve for the hypotenuse so we do the opposite. Let's name the given side, side a and the other side, side b
With the given hypotenuse and one side we use this formula:
side^2=hyp^-side^2
Hypotense = 5 feet
Side b = hyp^2-side^2
Side b = 5^2 - 3^2
Side b = 25 - 9
Side b = 16
Side b = sqrt of 16
B = 4 feet
Therefore B= 4 feet
