So in this question, you have a right angle and a 45° angle. If you subtract that from 180, you get 45, meaning that this triangle is a 45-45-90 triangle. This means that you have to divide the number across from the 90° angle by square root of 2 in order to find the value of the side across from the 45 degree angles. So if you divide the square root of 6 by the square root of 2, you get the square root of 3. Therefore, the answer is square root of 3.