# Trigonometry/Worked Example: Area of a Roof

 Area of a Roof The idea of this worked example is to measure the area of a roof, as seen in plan, and then divide by ${\displaystyle \displaystyle \cos \theta }$, where ${\displaystyle \displaystyle \theta }$ is the angle of slope of the roof, to get the area of tiles needed. And then the quantity of tiles. Intention is to use a real roof's plan, where all the slopes are the same.