ABCD is a quadrilateral in which AB`////`DC and AD`////`BC. Find `/_b,/_c` and `/_d`

ABCD is quadrilateral in which AB |\| DC and AD |\| BC . Find angle b, angle c, angle d .

in a quadrilateral ABCD find x.

ABCD is a quadrilateral, then /_A+/_B+/_C+/_D=

ABCD is a quadrilateral in which AD = BC and /_ DAB = /_ CBA Prove that (i) DeltaABD ~= DeltaBAC (ii) BD = AC (iii) /_ ABD = /_ BAC

Find the area of quadrilateral ABCD

Find the area of quadrilateral ABCD.

ABCD is a parallelogram DE _|_ AB, DF_|_BC . Find DF.

Construct A quadrilateral ABCD in which AB=5 cm, BC=4.5 cm, CD= 6 cm, /_B= 100^@ and /_C=75^@ .

In a Quadrilateral ABCD, cos A.cosB + sin C sin D=

ABCD is a quadrilateral with vec(AB)= vec(a), vec(AD)= vec(b) and vec(AC)= 2 vec(a) + 3vec(b) . If its area is alpha times the area of the parallelogram with AB, AD as adjacent sides, then alpha =