find the angle substended at the origin by the line segment whose end points are(0,100) (10,0)

The point (0,100) and (10,0) are on y-axis and x-

the point (0,100) on Y-axis ,(10,0) on X-axis. combine two points (10,0) and (0,100) with a straight line.from the graph there form a right angled triangle. So the at the origin is 90°......- durga prasad(iiit)