will fan and medal.
John is standing 21 meters from the wall of a building. The angle of elevation from his feet to the top of the wall is 30 degrees, as modeled in the diagram. What is the height of the wall, x? Round your answer to the nearest whole meter.

Question

will fan and medal. 
John is standing 21 meters from the wall of a building. The angle of elevation from his feet to the top of the wall is 30 degrees, as modeled in the diagram. What is the height of the wall, x? Round your answer to the nearest whole meter.

anonymous · Answer

attachment

sweetnikkie072 · Answer

cot theta=base/perpendicular
cot 30º=21/x; cot 30=√3
bring x on LHS
x=21/√3(height)