Divides a given line-segment externally in the ratio of 1:2
Construction:i )Draw BX making an actueangle at B.ii) Starting from B, mark 2 equal points on BX as shown in the figure.iii) Mark the second division point as Miv) Mark the first point (2-1=1) as N.v) Join NA.vi) Draw a line parallel to NA through M.vii) This line meets the produced BA line at P.viii) P is the required point which dividesAB externally in the ratio 1:2.