> An ellipse > major axis: 900 > minor axis: 450 > Two points on ellipse 150 and 250 distance > away from center line as shown in attached file. > Then how to measure the lenght of chord AB as shown > in > attached file ?
Equation of ellipse: x^2/900^2 + y^2/450^2 = 1. Solve for y>0, get y=g(x). Then your chord has endpoints (150,g(150)) and (250,g(250)). Now put these two points into the distance formula.