WHAT THE ACTUAL FAW IVE BEEN TRYING TO BINGE WATCH DANGANRONPA 2, SINCE IVE ALR BINGED WATCH SEASON 1, AND THE FIRST 3RD SEASON, I CHECKED HULU, NETFLIX, CRUNCHYROLL, FUNIMATION PLS HELP I JUST WANNA WATCH DANGANRONPA SOBS

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?