Inner Circle
  • trapezoid with a circle inside

    Observe the above isosceles trapezoid with its inscribed circle. If one base of the trapezoid is 8 units and the other is 18 units, determine the diameter of the inscribed circle.

Answer:    
  Please enter a numerical answer
(ex. 1000 or 2.033) and click GO.		    

Contest problems and answers provided by:

David Rock
rock_david@colstate.edu
Columbus State University

Doug Brumbaugh
brumbad@pegasus.cc.ucf.edu
University of Central Florida