# Math Help - Problem solving

1. ## Problem solving

From an office window 42.5m above level ground, a building 156m tall at a distance of 104m is observed across a courtyard. Find the angle of depression of the base of the building.

2. Hello, Kat.T!

Did you make a sketch?

From an office window 42.5m above level ground,
a building 156m tall at a distance of 104m is observed across a courtyard.
Find the angle of depression of the base of the building.
Code:
                  *
|
104    |
* - - - - - +
| * θ       |
|   *       |
42.5 |     *     | 42.5
|       *   |
|         * |
* - - - - - *
104

We have: . $\tan\theta \:=\:\frac{42.5}{104}$

Therefore . . .