Math Help - Angle

1. Angle

A line from a point on level ground to the top of a building is 640 feet long. The building is known to be 528 feet away from this point. What angle does this line make with the ground?

2. Originally Posted by christenc05
A line from a point on level ground to the top of a building is 640 feet long. The building is known to be 528 feet away from this point. What angle does this line make with the ground?

$\theta = cos^{-1}\frac{528}{640}$