Dominic is traveling through the state of Oregon from Salem to Eugene and then continue to Medford. The distance from Salem to Eugene is 76.2 miles. The total distance of his trip was 243.15 miles. What is the distance between Eugene and Medford?

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?