Question

What angle, to the nearest degree, does the wooden plank form with the ground?

Answer 1

29 degrees to nearest degree.

Explanation:

This is the angle whose tangent is 10/18 or 5/9.

this = 29 degrees

Answer 2

29°

Consider the right triangle between the plank and the ground

the angle can be found using tangent ratio

tanx° =
`(opposite)/(adjacent)`

where adjacent = 18 and opposite = 10

tanx° =
`(10)/(18)`

x =
`tan^(-1)`(
`(10)/(18)`) = 29.0546 ≈ 29°