What is (766*67*89*8*9*87656*7*908786*5*687 *78*87*797*87897*8989*089*7654*4*36 7567*98097987567544*535*567*9*8*678 7)0(5*64543534*243467*5*9*7675*643* 23*65*878778776546453*53*467*798*89 *675*546*32*53*6465*8*76546*34)

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?