Kevin has a rectangular swimming pools that is 12
feet by 16 feet. He wants
to put a rope diagonally
across the pool. How long
does the rope need to
be?

20 feet long

Step-by-step explanation:

To solve this you need to use the Pythagorean theorum, , where c is the length of rope needed and A and B are the side lengths. Think of it like a right triangle.

So, the equation is

Which is then

And the possible values of c are 20 and -20.

From here we know the answer cannot be -20 because you cannot have a negatively long length of rope, so the answer must be 20 feet.

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