PDF chapter test TRY NOW
The horizontal distance between two buildings is 70 \ m. The angle of depression of the top of the first building when seen from the top of the second building is 45^{\circ}. If the height of the second building is 120 \ m, find the height of the first building.
Answer:
The height of the first building is .
(Note: Enter the number in the first box and the unit in the second box.)