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Ber [7]
3 years ago
12

Need help pls on circle geometry

Mathematics
1 answer:
Katyanochek1 [597]3 years ago
3 0

Answer:

25

Step-by-step explanation:

AB is a tangent to the circle hence the angle ABO is a right angle !!! With that knowledge we can construct a right-angled triangle with sides AB ,BO and OA .

Applying the Pythagorean theorem we get that OA is the hypotenuse and thus

oa =    \sqrt{ab {}^{2} + ob {}^{2}  }

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