O is the circumcentre of `Delta ABC` and OD is perpendicular on the side BC, prove that ` angle BOD= angle BAC`

If O is the circumference of a /_ABC and OD perpendicular BC,prove that angle BOD = angle A.

If O is the circumcentre of a ABC and OD perp BC, prove that /_BOD=/_A

If O is a circumcentre of DeltaABC and OD_|_BC the find angleBOD ?

O is the circumcentre of Delta ABC and OD bot BC . Prove that angle BOD= angle BAC

O is the circumcentre of the Delta ABC . A and BC lie on the opposite of the centre O. If angle BOC=120^(@) , then angleBAC =

O is the circumcentre of the traiangle ABC prove that angleOBC+angle BAC=90^(@)

O is the circumecentre of Delta ABC and D is the mid point of BC. If angle BAC=40^(@) , then find the value of angle BOD .

I and O are incentre and circumcentre of a Delta ABC . AI is produced and it intersects the circumcircle at D. angle ABC=x, angle BID=y & angle BOD=z . Find (z+x)/(y)

In a triangle ABC, AB = BC, AD is perpendicular to side BC and CE is perpendicular to side AB. Prove that : AD = CE.