# AB is tangent to circle O at B. What is the length of the radius r? Round to the nearest tenth.

7.0

3.6

13.0

9.9

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Answered by

thetechponyThe length of the radius r for AB = 5 and AO = 8.6 is 7. The correct answer between all the choices given is the first choice or letter A. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

Answered by

jdoe0001Check the picture below. bearing in mind that the point of tangency, in red, is always a right-angle.