find the angles of intersection when the line through the points (3,4) and (-5,0) intersects the line through (0,0) and (-5,0)

Find the angle of intersection when the line through the points $(3,4)$ and $(-5,0)$ intersects the line through $(0,0)$ and $(-5,0)$.

So we have points (3,4) and (-5,0) . Its equation of line would be 2y = x + 5
The other is (0,0) and (-5,0) . Its equation would be y = 0