Type the correct answer in the box. Write your answer to one decimal place.
A right triangle D E A. C is a point of side D A and B is the corresponding point on side A E. A line labeled boy runs from C to B and side E D is labeled lamppost. Side A B is labeled shadow.
A boy who is 1.8 meters tall stands 1 meter away from a lamppost and casts a shadow 2 meters long.
The height of the lamppost is box meters.