Answer is 13.41
Explanation: If you use the Pythagorean Therom correctly, you would have to do 6 to the power of 2 plus 12 to the power of 2. 6 to the power of 2 is 36 and 12 to the power of 2 is 144, add them both that would get you 180. After that you would have to square root 180, you have to get you calculator and do that. After you do that you will get 13.41. Please mark brainlest answer
