ThecolouroftheOlympicringsrepresent satleastonecolourfromeverynational ag in the world. These were the Olympic rings placed on Tower Bridge during the London 2012 Olympics. If the diameter of each ring is 110m what is the total length of metal needed to create the symbol, give your answer in kilometres.

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?