Mark H. answered 06/23/19
Tutoring in Math and Science at all levels
The diagonal is the hypotenuse of a right triangle, The other 2 sides are the height and width.
Since the angle is given between the hypotenuse and the width, the width is the "adjacent" side of the angle.
This means the height is the "opposite" side.
So:
tan (350) = opposite / adjacent = height / 20
Solve this for the height.....
For any problem like this, DRAW A PICTURE