1.

Let ABCD be a quadrilateral with area 18, with side AB parallel to the side CD and AB = 2CD. Let AD 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. 3/2
D. 1
Answer» C. 3/2


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