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Q: In ΔABC, AB=c cm, AC= b cm and CB=a cm, If  ∠A=2 ∠B, then which of the following is true?

A. $$ {a^{2}=b^{2}-bc}$$
B. $$ {a^{2}=b^{2}-ac}$$
C. $$ {a^{2}=b^{2}+bc}$$
D. $$ {a^{2}=b^{2}+ac}$$
Answer» D. $$ {a^{2}=b^{2}+ac}$$


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