1. J

    Cocky UPenn student throughs down challenge

    This is a tedious drawing so if you are going to procede I'll thank you in advance. Here is my reasoning for solving this problem. Call the intersection of BE and CD point M. Let ADE=x, EDM=y, DEA=z, and DEM=140-z. Thus we have the following system of equations: (x+y)+20+10=180...