Question 132930
We can use trigonometry to find the angle.

I will use the tangent function, which tells me that it is equal to the opposite side of the right triangle divided by the adjacent side of the right triangle.

Let x (or any letter that you like) = the angle.

So, x = angle.

tan(x) = opposite side/adjacent side

We now have this:

tan(x) = 15/20

x = tan^-1(15/20)

NOTE: The symbol tan^-1 means "tangent inverse."

When looking for an angle in trigonometry, you must use the inverse key on your calculator.

x = 36.86989765

I will round 36.86989765 to the nearest hundredths and the angle is 36.87 degrees.

Did you follow?