Can someone s. u.b to meh yt chan nel, ill mark u brainliest

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

Which one is true about the hexagons ?

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?