Qus
In a trapezium ABCD, if AB|| CD, then
(AC*2+ BD*2) = ?
(a) BC*2+ AD*2 + 2BC · AD
(b) AB*2 +CD*2 + 2AB.CD
(c) AB*2+CD*2+2AD.BC
(d) BC*2 + AD*2 + 2AB.CD
please answer me correctly
(* ) means square
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Answer:
(d) BC² + AD²+ 2AB.CD
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