Atree on a hillside casts a shadow c = 220 ft down the hill. if the angle of inclination of the hillside is b = 15° to the horizontal and the angle of elevation of the sun is a = 45°, find the height of the tree.

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?