00:01
So in this question, we have a triangle situation like this, where this is a right angle.
00:05
And what we're given in this portion of the question is that jl equals 9 and jm equals 6.
00:11
So to draw what that actually is, we have 6 here, 9 here and 6 here.
00:15
So to find this altitude part, we're going to use the pythagorean theorem.
00:18
So 81 minus 36 equals x squared, or what we're trying to find.
00:24
So to do 81 minus 36, we have 45, so 45 equals x squared.
00:30
So this means that x is equal to the square root of 45 or 9 times 5, which is 3 root 5...