MathDB

TOT 2004 Spring - Senior O-Level p1 collinear wanted

Source:

February 25, 2020

geometrycollinear

Problem Statement

Segments

AB, BC

and

CD

of the broken line

ABCD

are equal and are tangent to a circle with centre at the point

O

. Prove that the point of contact of this circle with

BC

, the point

O

and the intersection point of

AC

and

BD

are collinear.