Question

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Answer 1

Answer:

160 degrees

Step-by-step explanation:

BO,OC , AO  are all radiuses of the circle hence,

BO = OC = AO

In triangle AOB AO = BO

hence, triangle AOB is an isosceles triangle

and angle OAB = angle OBA = 45 degrees

Sum of angles in a triangle = 180

45 + 45 + angle AOB = 180

angle AOB = 180 - 90 = 90

In triangle AOC AO = CO

hence, triangle AOC is an isosceles triangle

and angle OCA = angle OAC = 35 degrees

Sum of angles in a triangle = 180

35 + 35 + angle AOC = 180

angle AOC = 180 - 70 = 110

angle AOC + angle AOB = 90 + 110 = 200

angle BOC = 360 - 200 = 160 degrees

Answer 2

Answer:

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Answer in the attachment