Assuming i understand the questions (As shown is tough when not shown) you have a triangle with bottom 5 and opposite side 6 and you want to find the angle made with the ground,

Well,

tan \(\displaystyle \theta \) = opposite / adjacent

therefore,

tan \(\displaystyle \theta \) = 6/5

so,

\(\displaystyle \theta \) = tan-1 (6/5)

hence, \(\displaystyle \theta \) = 50.19 degrees