Mathematics for IGCSE & O level - Pythagoras' Theorem And Trigonometry (Section 4 - No. 25)
If the angle of elevation from point A to the top of a building is 45 degrees, and you are standing 50 meters away from the building, what is the height of the building (assuming a level ground) ?
25 meters
50 meters
75 meters
100 meters
คำอธิบาย
tan(45) = height / distance, height = 50 * tan(45) = 50 meters.