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Sagot :

Kirubarima0816idn

Answer:

answer = 130 degree.

Step-by-step explanation:

I hope is correct.

Thebecksidn

Answer:

choice 2) angle DOC = 145 degrees

Step-by-step explanation:

angle ABD = 1/2(30 degree arc) = 15 degrees because of the inscribed angle theorem.

angle AOB = 180 - 20 - 15 = 145 degrees

angle DOC  = angle AOB because it is a vertical angle to 145 degrees.

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