Answer: 36°
Explanation:
In a right triangle, the trigonometric functions can be expressed as:

where
is one of the angles, OS and AS are the opposite side and the adjacent side respectively, and H is the hypotenuse.
In this case, we have the data for the opposite side to the angle that we want to find, so we're going to use the
:

Rounded to the nearest degree:
x = 36°
So, the angle that the slide makes with the ground is approximately 36°.