Posted by Alia on .
at a distance of 20m from a building, a person who is 3 m tall looks up at an angle of 25 degrees to see the top of the building. how tall is the building to the nearest meter?

geometry 
bobpursley,
Tangent25=(h+3)/20
solve for h.
This person is quite tall, almost 10 feet tall. He can dunk the basketball with arms horizontal. I wonder if your teacher has met a 3 meter tall person?