One tower is 18 m in height, and another tower is 30 m in height. Their bases are 16 m apart. How far apart are the tops of the two towers?
so if 1 tower is 18m and another is 30m it would form a trapezoid, something like this:
*this is not drawn to scale*
as you can see, it forms a right triangle, with legs of 16 and 30-18=12!
so, the missing length is \(16^2+12^2=y^2\)
i hope this helped you! :)