Help please I'm so bad at math

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

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?

John has 1/2 pound of oranges to share with julie. if they share the oranges equally, how much will each of them have?