Answer
$22^{\circ}$
Work Step by Step
1. We know the opposite side, and we can find the adjacent side to the angle
$b = 200ft$.
2. Use the Pythagorean theorem to find the length of the diagonal of the base of the pyramid.
$700^2 + 700^2 = x$
$x = 989.9 ft$ but we need only half of the length to our right triangle
$a = 0.5 \times x \approx 495 ft$
3. Use inverse of tangent to find the angle of elevation.
$\tan ^{-1} \frac{200}{495}= 22^{\circ}$
