(i) The circumcentre of the triangle ABC is O, If `angle BOC=80^@,` then `angle BAC=`

(ii) Orthocentre of the triangle ABC is O, If angle BAC=40^@ , then angle BOC=

(iii) Incentre of the triangle ABC is O, If angle BAC = 40^@ , then angle BOC =

O is the circumcentre of the triangle ABC. If angle BAC =50^@ , then angleOBC is equal to

The circum-centre of a triangle ABC is O. If angle BAC = 85 ^(@) , angle BCA =75^(@) , then angle OAC is of

The circumcentre of the triangle ABC is O . Prove that angle OBC+angle BAC=90^@ .

The circumcentre of the triangle ABC is O . Prove that angle OBC+angle BAC=90^@ .

O is the circumcentre of the triangle ABC and angle BAC = 85^@ , angle BCA = 75^@ , then the value of angle OAC is

If O is the circumcenter of triangle ABC and angle OBC = 35^@ , then the angle BAC is equal to यदि O, triangle ABC का परिकेन्द्र है और angle OBC = 35^@ तो angle BAC बराबर है-

(xi) O is the orthocentre of the DeltaABC If angle BAC=55^@ , then angle BOC=

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