Hey!
So, we will have to use the Pythagorean Theorem in order to find the length of the pipe that will be run along the diagonal of the lawn. So, this theorem states that,
[tex]a^2+b^2=c^2[/tex]
Let's plug in the values.
[tex]15^2+8^2=c^2[/tex]
Simplify.
[tex]289=c^2[/tex]
Let's take the square root.
[tex] \sqrt{289} = \sqrt{c^2} [/tex]
Simplify.
[tex]17 ft=c[/tex]
This tells us that the length of the diagonal piece of pipe will be 17 feet.
Thanks!
-TetraFish