You can put this solution on YOUR website! what is the angle of elevation of the sun when a 35-ft mast casts a 20-ft shadow
I can't show you the triangle, but draw a rigth triangle with the mast going up and down (it's the opposite side of the angle we're after) and the shadow running flat (it's the adjacent side of the angle we're after.
x=tan^-1 You'll need a chart or scientific calculator for this. degrees.