__In ≈í√Æ ABC, AD ‚Äö√§‚Ä¢ BC, then__ – McqOptions

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1.	__In ≈í√Æ ABC, AD ‚Äö√§‚Ä¢ BC, then__
A.	AB2 - BD2 = AC2 - CD2
B.	AB2 + BD2 = AC2 - CD2
C.	AB2 - BD2 = AC2 + CD2
D.	AB2 - AC2 = BD2 + CD2
Answer» B. AB2 + BD2 = AC2 - CD2

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