The homoegeneous wire ABCD is bent as shown and is supported by a pin at B. Knowing that l=8, determine the angle theta for which portion BC of the wire is horizontal. Below is the free body diagram with the forces exerted by the pin indicated by the two arrows on the wire. How do I approach this problem? The first part of the wire is a semi-circle with radius 6 and second part a horizontal line with length 6, and the third part a diagonal line iwth length 6.