ok
height = 2 ft
ramp is 23 ft long
angle = ?
To solve this problem use trigonometric functions.
The trigonometric function that relates the opposite side and the hypotenuse is sine.
then,
sin 0 = 2/23
Simplification
sin 0 = 0.087
Result
0 = angle = 4.99 or rounding = 5°