The above diagram shows 3 identical circles placed inside a right triangle so that all 3 circles are tangent to line

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The above diagram shows 3 identical circles placed inside a right triangle so that all 3 circles are tangent to line \(AB.\) What is the radius of each circle?

A) 5
B) 6
C) 7
D) 8
E) 10

[spoiler]OA=A[/spoiler]

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