SOLUTION: Suppose a right triangle has two legs, one of length 5 and the other of length 3. What is the length of the hypotenuse? Please show work.

Question 243575: Suppose a right triangle has two legs, one of length 5 and the other of length 3. What is the length of the hypotenuse? Please show work.
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!

We basically have this triangle set up:

To find the unknown length, we need to use the Pythagorean Theorem.

Remember, the Pythagorean Theorem is where "a" and "b" are the legs of a triangle and "c" is the hypotenuse.

Since the legs are and this means that and

Also, since the hypotenuse is , this means that .

Start with the Pythagorean theorem.

Plug in , ,

Square to get .

Square to get .

Combine like terms.

Rearrange the equation.

Take the square root of both sides. Note: only the positive square root is considered (since a negative length doesn't make sense).

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Answer:

So the solution is which approximates to .

So the hypotenuse is approximately 5.831 units long.
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