Answer:
The answer is 6 feet.
Explanation:
Let's take a right angled triangle ABC which has 3 sides of lengths a, b and c. c is the longest side or the hypotenuse.
Then by Pythagoras rule:
Let's take the length of the unknown leg in the figure as
.
Now lets substitute the values from the figure to above equation.
![x^(2) +5^(2) =√(61) ^(2)](https://img.qammunity.org/2019/formulas/mathematics/college/xx8oi6rs5ulni0xionkdseohplu6bk7rlk.png)
=
![x^(2) +25 =61](https://img.qammunity.org/2019/formulas/mathematics/college/49wce1juzdej39hqxvv8amhyezzzeouxxc.png)
=
![x^(2) =61-25](https://img.qammunity.org/2019/formulas/mathematics/college/3myvoob2w7ld3vxsox89xbuiw0tw2ig9t0.png)
=
![x^(2) =36](https://img.qammunity.org/2019/formulas/mathematics/college/xu9wq647pth2t8fp756fhyg1kde0vhdmvi.png)
=
or
![x=-6](https://img.qammunity.org/2019/formulas/mathematics/college/9vfi9ksk9lpxbfi6umxlzs1r7thsm5ho5m.png)
Length of a triangle cannot be a negative value, so we can take +6 as the value of x.
So the answer is 6 feet.