[" In a "/ABC,/B" is an acute angle and ...

[" In a "/_ABC,/_B" is an acute angle and "AD perp B" ."],[" Prove that "],[[" (i) "AC'=AB^(2)+BC^(2)-2BC times BD],[" (ii) "AB^(2)+CD^(2)=AC^(2)+BD^(2)]]

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In a Delta ABC , angleB is an acute-angle and AD bot BC Prove that : (i) AC^(2) = AB^(2) + BC^(2) - 2 BC xx BD (ii) AB^(2) + CD^(2) = AC^(2) + BD^(2)

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