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While standing on top of a building 50m tall you spot your friend standing on a street corner. Using a protractor and dangling a plumb bob, you find that the angle between the horizontal and the direction to the spot on the sidewalk where your friend is at 25 degrees. Your eyes are located 1.75m above the top of building. How far away from the foot of building is your friend?

Question

Need help, thank 
While standing on top of a building 50m tall  you spot your friend standing on a street corner. Using a protractor and dangling a plumb bob, you find that the angle between the horizontal and the direction to the spot on the sidewalk where your friend is at 25 degrees. Your eyes are located 1.75m above the top of building. How far away from the foot of building is your friend?

anonymous · Answer

Let us picture each situation.
For the protractor use, from the horizontal (x-axis) to the spot where your friend is|dw:1401126798591:dw|

anonymous · Answer

Ok

anonymous · Answer

For the building and the height of your eyes|dw:1401126953761:dw|