If ab=7 and ao=17.4, what is the length of the radius (r)? round to the nearest tenth. (will mark brainliest)

We know that B is a point of tangency, so as known from the problem is tagent to the circle in this point. We also know that the segment line is perpendicular (given that this segment is the radius) to the previous tangent, therefore we are in the presence of a right triangle. Then, the following equation is true:



being

Then:




 

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