Question

A building lot in a city is shaped as a 30° -60° -90° triangle. The side opposite the 30° angle measures 41 feet.

Answer 1

There is more to the puzzle right?
If not, the side opposite the 90° angle is 82 feet.
Here's a good page to help you with 30° 60° 90° triangles.
http://1728.org/trig2.htm