The triangle shown below has an area of

units

.
A scalene triangle. There is a dashed line that is perpendicular to the base from the base to the opposite vertex. The base is labeled 6. The height is labeled x. The longest side is labeled 10.



A scalene triangle. There is a dashed line that is perpendicular to the base from the base to the opposite vertex. The base is labeled 6. The height is labeled x. The longest side is labeled 10.
Find the missing length.


units