(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 =

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

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

If ‘'O’ is the orthocenter of the triangle ABC and angle BAC = 80^@ , then the measure of angle BOC is :- यदि त्रिभुज ABC का लम्ब केन्द्र 'O' है तथा angle BAC = 80^@ है, तो angle BOC का माप है।

(iii) O is the incentre of the DeltaABC and angle BOC=116^@ . Then angle BAC=

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

O is the incentre of Delta ABC and angle A=30^(@) , then find angle BOC .

(viii) O is the orthocentre of Delta ABC. If angle BOC=4 angle BAC , then find angle BOC and angle BAC .