if \( A D, A E \) and \( B C \) are tangents to the circle at \( D,...

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if \( A D, A E \) and \( B C \) are tangents to the circle at \( D, E \) and \( F \) respectively.
Then,
(a) \( A D=A B+B C+C A \)
(b) \( 2 A D=A B+B C+C A \)
(c) \( 3 A D=A B+B C+C A \)
(d) \( 4 A D=A B+B C+C A \)
IV
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