What is the value of x in the diagram?
That straight up and down line, let's just call that A, as in altitude. Use trig.
so, in a right triangle. sine of an angle is opposite over hypotenuse
sine 60o = A/2
0.866 = A/2
A = 1.732
now that you know A, go to the triangle on the other side.
sine 45o = 1.732/x
0.707 = 1.732/x
x = 1.732/0.707
x = 2.45