Answer:
14.97 ft
Explanation:
We have a right angled triangle with a side length of 12 inches and hypotenuse of 15ft.
To find the other side length, we will use the Pythagoras Theorem but before that, we need to make the units same for both the given sides.
Since 1 feet has 12 inches so we can use both the sides in ft to find the third side length.
![a = √(b^2+c^2)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/j5081uz79zgsnli2swjmcxv7d7j08irh0p.png)
where c is the hypotenuse and a and b are the rest of the sides of the triangle.
![b = √((15)^2-(1)^2)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/q2s8um26wvstc82tl03po4l0wmdzdaowpv.png)
![b = √(224)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/hsou60ej4aldn7iu7bnlxnifr64ftoe6lt.png)
![b = 14.97](https://img.qammunity.org/2019/formulas/mathematics/middle-school/s8qrpf5bfbrccl2op9cymuiwhld06cye9u.png)
Therefore, the third side length is 14.97 ft.