Question

plzz.... solve this
it's urgent​

Answer 1

Answer:

40°

Step-by-step explanation:

AOC=50°,OAC=90°,

ACO=180°-(90°+50°)

=180°-140°

=40°

hope it helps

Answer 2

Answer:

AngleAOC + Angle BOC = 180(Linear pair)

AngleAOC = 180 - 130

AngleAOC = 50

Now, AngleOAC = 90(tangent are perpendicular to center)

Therefore,AngleACO = 180 - AngleAOC + AngleOAC

AngleACO = 180 - 90 + 50

Angle ACO = 40°

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