AB is tangent to circle O at B. what is the length of the radius r? Round to the nearest tenth. Look at image attached.

Mathematics

2 answers:

Alexxx [7]3 years ago

4 0

Check the picture below.

kompoz [17]3 years ago

3 0

OAB is a right triangle. Of this triangle, you know the hypothenuse (OA) and the longest leg (AB). You can find the radius, which is the shortest leg, by applying Pitagora.

r (OB) = √OA²-AB² = √9,8²-5² = √96,04-25 = √71,04 ≈ 8,4 (units?)

Answer D

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