" 5) If "ABCD" is a square,then prove that "2bar(AB)+4BC+5CD+7DA in3C

If ABCD is a square then, 2bar(AB)+4bar(BC)+5bar(CD)+7bar(DA)=

ABCD is a quadri,aterial prove that (AB+BC+CD+DA)gt(AC+BD)

If ABCD is a cyclic quadrilateral, then prove that AC.BD=AB.CD+BC.AD

If ABCD is a square, then bar(AB) + 2 bar(BC) + 3 bar(CD) + 4 bar(DA) =

ABCD is a quadrilateral. Is AB+ BC + CD+ DA gt AC+ BD ?

ABCD is a quadrilateral. Is AB+BC +CD + DA gt AC + BD ?

In quadrilatcal ABCD,prove that AB+BC+CD+AD<2(BD+AC)

ABCD is a rhombus.Prove that AB^(2) + BC^(2) +CD^(2) + DA^(2) = AC^(2) + BD^(2)

If the diagonals of the quadrilateral ABCD intersect each other orthogonally,then prove that AB^(2) + CD^(2) = BC^(2) + DA^(2)