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

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

ABCD is trapezium in which AB "|| "CD . If AD = BC, show that angle A = angle B and angle C = angle D .

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

ABCD is trapezium in which AB"||"CD . If AD =BC , show that angleA=angleB and angleC = angleD .

In the given figure, AD is perpendicular to BC and EF "||" BC , if angle EAB = angle FAC , show that triangles ABD and ACD are congruent. Also , find the values of x and y if AB = 2x+3 , AC = 3y+1 , BD = x and DC = y+1 .

In /_\ABC , angleA=30^@, angle B=45^@ find angle C

ABCD is a trapezium in which AB||DC the diagonals AC and BD are intersecting at E. IF DeltaAED is similar to DeltaBEC , then prove that AD=BC.

square ABCD is a trapezium in which AB////CD ,if angleA = 45^@ ,then angleD =

If Three angles of a quadrilateral are 80^@ , 60^@ and 70^@ . Find the value of the fourth angle.

Find angle a,angle b, angle c, angle d, angle e in the figure?