Since the diagram in question is a right angled triangle, we will use Pythagoras theorem to get the height of the ramp.
Let the height of the ramp be 'x'
Pythagoras theorem states that the square of the sum of the opposite and adjacent side of a right angled triangle is equal to the square of the hypotenuse.
Mathematically we have;
10² = 8² + x²
Note the the longest side is always the hypotenuse and the side facing the acute angle is opposite leaving the remaining side as adjacent.
All I can tell you is that there is no outlier. Consider an outlier as a number that is far out, or odd in a series of numbers as such. For example, if you had {1,2,3,4,40}, 40 would be the outlier.
