Someone Please help ASAP

Can someone check if i did this correct. it’s number 4 if you’re wondering.

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?

Explain how you could use the interactive table to tell if sets of points are on the same line. math 8