Answer:
A. 12.21
Step-by-step explanation:
<u>Define and explain:</u>
This a right triangle, so the Pythagorean Theorem applies. The Pythagorean Theorem states that the sum of the squared legs is equal to the squared hypotenuse.
The legs of a triangle are the sides that form the right angle.
The hypotenuse is the longest side.
<u>Formula:</u>



Here, I am solving for the hypotenuse.



The last step is to find the square root of 149.
The square root of 149 is irrational, of course, so I must round the square root to the nearest hundredth.
≈ 

<u>Conclude:</u>
I, therefore, believe the length of the hypotenuse is 12.21.