Question

Anyone know the answer?

Answer 1

Answer:

They will need √161 feet, or about 12.69 feet of fencing. √161 is irrational because 161 is not a perfect square.

Step-by-step explanation:

${8}^{2} + {x}^{2} = {15}^{2}$

$64 + {x}^{2} = 225$

${x}^{2} = 161$

$x = \sqrt{161} = 12.69$