Question

Two circles intersect at 2 points A B, AD AC are diameters of the two circles.Prove that D,B,C are collinea r.


plz give an answer to this becaz tommarow iam having my bord exam

Answer 1

let O and O' be the centres of 2 circles which intersects at A and B. AC and AD are the dimeters of circle O and O' respectively 
JOIN AB
we know that , ∠ is a semi-circle is 90°
∠ABC=90°..............(1)
∠ABD=90°..............(2)
Adding (1) and (2) we get 
∴∠ABC+∠ABD=90°+90°
∴∠CBD=180°
→CBD is a straight line.
Thus, B lies on the line segment CD.


May you understand short forms which I use some where 
May it helpful to you. sorry for the fig  
thanks

Answer 2

see the attachment for answer