Let `ABCD` be perpendicular to `AB and CD.` If a circle is drawn inside the quadrilateral `ABCD` touching all the sides, then its radius is : (a) `3` (b) `2` (c) `32`(d) `1`

Let ABCD be a quadrilateral with area 18 , side AB parallel to the side CD, and AB=2CD .Let AD be perpendicular to ABandCD .If a circle is drawn inside the quadrilateral ABCD touching all the sides,then its radius is 3 (b) 2 (c) (3)/(2) (d) 1

A circle touches all sides of quadrilateral ABCD then which one of these is true :

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

Let ABCD be a quadrilateral in which AB is parallel to CD and perpendicular to AD,AB =3 3CDand the area of the quadrilateral is 4 square units.If a circle can be drawn touching all the sides of the quadrilateral,then its radius is:

A circle of centre O inscribed in a quadrilateral ABCD which touches all the sides of a quadrilateral. If angleAOB=115^(@) . Find angleCOD .

A circle touches all the four sides of a quadrilateral ABCD.Prove that AB+CD=BC+DA

A circle touches all the four sides of a quadrilateral ABCD .Prove that: AB+CD=BC+DA

Sides AB and CD of a quadrilateral ABCD are extended as in figure. Then a + b is equal to

Sides AB and CD of a quadrilateral ABCD are extended as shown in the figure Then a+b is equal to