7. Solve the unknown sides and angles. B 12 E 108. There is an antenna on the top of a building. From a location 300 feet from the base of the building, the angle of elevation to the top of the building is measured to be 40. From the same location, the angle of elevation to the top of the antenna is measured to be 43. Find the height of the antenna.9. The crew of a helicopter needs to land temporarily in a forest and spot a flat piece of ground (a clearing in the forest) as I T a potential landing site, but are uncertain whether it is wide 100 feet enough. They make two measurements from A (see picture) I A finding a = 25" and B = 54". They rise vertically 100 feet to B and measure y = 47. Determine the width of the clearing to the nearest foot. CH clearing