How tall is the building next door?

Question

Haley is standing on the roof of a building 100.0 ft. above the ground looking
down at the building next door. She finds the angle of depression to the
roof of that building from the roof of his building to be 20, while the angle
of depression form the roof of his building to the bottom of the building
next door is 55. How tall is the building next door?

Answer 1

angle of depression is 20 to roof and 50 to ground for Haley who is 100 feet above ground in the next building over. how tall is the building he's looking at??

about 69.46 feet

construct some right triangles, and use the law of sines