A squared + B squared = C squared. A base of 33" X 33" = 1089 ". B vertical leg of 60" X 60" = 3600". C hypotenuse 1089" + 3600" = 4689". Square root of 4689" = 68.476". Don't know about the angles. It's been thirty-five years since I had a geometry class. My daughter just came into the room .She's a college girl. Mom"s yelling at us to come to dinner! I'll try to get the angles figured out after dinner.