Question

O is the centre of the circle and AOB= 70°, find OBA and OAC.​

Answer 1

Answer:

we know a is right angle tringle

Step-by-step explanation:

OA=R    OB=R  

then the angle B and angle OAB equal

180-70=55

B=55  and OAB= 55

OAC= 90-55= 45

Answer 2

Answer:

may be heplful !!!!!!!