OD is the bisector of angle AOC, OE is the bisector of angle BOC and OD perpendicular to OE.

In Fig, OD is the bisector of angle AOC, OE is the bisector of angle BOC and
OD perpendicular to OE. Show that the points A, O and B are collinear.
In Fig. 6.9, OD is the bisector of ∠AOC, OE is the bisector of ∠BOC and
OD ⊥ OE. Show that the points A, O and B are collinear.
Class 9 Maths Chapter 6 Lines and angles important questions

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