Two buildings stand 90 ft apart at their closest points, the angle of depression from the top of the taller building to the top of the shorter building is 12 degrees. how much taller is the taller building? draw a diagram to support your answer. round your answer to the nearset foot. explain your answer

A new kind of temporary pavilion support for a square roof uses just two poles set at the diagonal corners of a square. The allowable distance between the poles is 18 feet. Find the area of the roof. The sides will have lengths of 18/sqrt(2). Since they are perpendicular, the area of the square will be (18^2)/2 = 81*4/2 = 162 square feet. 

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