Question

if O is the centre of the circle angleABO= 50° and angle ACO=20° the measures of the angles
1)angle OAB=
2)angle OAC=
3)angle BAC=
4)angle BOC=
5)angle BOA=​

Answer 1

Answer:

OAB = 50°

OAC = 20°

BAC = 50 + 20 = 70°

BOC = 360 - (180 - 50 - 50) - (180 - 20 - 20) = 140°

BOA = 180 - 50 - 50 = 80°