Which represents a line that is perpendicular to the line that passes through the points -4,8 and -8,-2

Are the corresponding angles congruent? explain why or why not.

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?

Im so bad at fractions they are not my best math thing to work on