In quadrilateral ABCD ,side DC is largest show that AB + AD > DC - BC

In a quadrilateral ABCD, vec(AB) + vec(DC) =

In quadrilateral ABCD, side AB is parallel to side DC. If angleA : angle D=1:2 and angleC: angleB=4:5 . (i) Calculate each angle of the quadrilateral. (ii) Assign a special name to quadrialateral ABCD.

In a quadrilateral ABCD, it is given that AB |\|CD and the diagonals AC and BD are perpendicular to each other. Show that AD.BC >= AB. CD .

In quadrilateral ABCD, AB=DC and AD=BC. Prove that the sides AB and DC are parallel to each other.

In quadrilateral ABCD, AB is the shortest side and DC is the longest side. Prove that : (i) angleB gt angleD (ii) angleA gt angleC

Find the area and the perimeter of quadrilateral ABCD, given below, if, AB = 8 cm, AD = 10 cm, BD = 12 cm, DC 13 cm and angleDBC=90^(@) .

If the sides of a quadrilateral ABCD touch a circle prove that AB+CD=BC+AD.

In a quadrilateral ABCD angle B = angle D = 90 ^(@) Prove that : 2AC^(2) - BC^(2) = AB^(2) + AD^(2) +DC^(2)

A quadrilateral ABCD is drawn to circumscribe a circle. Prove that AB+CD=AD+BC. or A circle touches all the four sides of a quadrilateral ABCD. Prove that AB+CD=BC+DA.

In Figure, a quadrilateral ABCD is drawn to circumscribe a circle . Prove that AB+CD=BC+AD