Answer: 7√ 3
Explanation:
Yes, it is possible because in a triangle where the angles are 30, 60 and 90 degrees there is a rule:
* The length of the side across the 30 degree angle is "a"
* The length of the side across the 60 degree angle is "a√ 3"
* The length of the side across the 90 degree angle is "2a"
So if we know the length of the side across the 30 degree angle, we can easily determine the length of other sides.
In this case a is 7, which makes a√ 3, 7√ 3
I hope it helps!