Answer: 4
Explanation:
To solve this problem we can use the Pythagorean Theorem to find the length of the other LEG of a right triangle
Pythagorean Theorem can be written as A^2+B^2=C^2
Now we plug in the values. C represents the hypotenuse while A and B represent the legs. We only are given one leg and the hypotenuse so we will be solving for B. (Or A if you swap the legs around)
3^2+b^2=5^2
9+b^2=25
Subtract 9 from both sides:
16=b^2
Now we take the square root of both sides
b=4
The length of the other leg of the triangle is 4 feet.
This is a basic 3-4-5 Triangle. Anytime the hypotenuse of a triangle is 5 and the leg is 3 the other leg will always be 4.