compute the value of a v [ 0.5 , 1 ] . what does this value measure on the graph? what does this value tell us about the motion of the ball? in particular, what are the units on a v

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?