The lines y=5/12x and y=4/3 are drawn in the coordinate plane. Find the slope of the line that bisects these lines.
How? Do we find the average? Do we build isosceles triangles?
since y=4/3 is parallel to the x-axis, all we need is 1/2 arctan(5/12)
That's if you want the slope of the line that bisects the angle between the other two lines. (Don't know what it means to bisect two lines.)