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Please help, geometry b

Please help, geometry b-example-1
User Khant
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1 Answer

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Answer:

Radius=2sqrt(30)

Explanation:

Tangents drawn from a common point are equal in length, so AB=BD, 2x-2=x+5, x=7. Next CDB is a right angled triangle, so CD^2+DB^2=CB^2, CD=7 and CB=13, CD=sqrt(120)=radius

User Mmgp
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